synthesis of cobalt complex lab report

The acetyl acetonato anions are attract to the positive center of the R.J.Geue,T.W. Cobalt Nitrate ([Co(H2O)6](NO3)2 or Co(NO3)26H2O) is a typical hydrated cobalt(II) salt which consists of octahedral Co(H2O)62+ cations and nitrate anions in the solid. The presence of the metal ion also provides a favourable equilibrium 5 Make note of the wavelength of maximum absorbance or peak positions. Introduction to Business Management (Gawie S. Du Toit; Barney Erasmus; Johan Wilhelm Strydom), Fundamentals of Business Management (McGraw Hill), Head First Design Patterns (Elisabeth Freeman), The Law of Contract in South Africa (Dale Hutchinson and Others), SILKE: South African Income Tax (M Stiglingh, AD Koekemoer, L van Heerden, JS Wilcocks, RD de Swart, P van der Zwan), Principles & Practice of Physics (Eric Mazur; Daryl Pedigo; Peter A. Dourmashkin; Ronald J. Bieniek), Discovering Psychology (Cacioppo John T.; Freberg Laura), Strategic Management (Lynette Louw; Peet Venter), Civil Procedure: A Practical Guide (Stephen Pete), Applied Business Statistics (Trevor Wegner), Law of Persons and the Family (Amanda Barratt), practical report based on synthesis of cobalt complexes, Reaction mechanism between chromium and EDTA, Stability of compounds through p H measurements, CAPS-FET- -LIFE- Orientation- -GR-10-12- -WEB E6B3-1, Advert Assistant Agricultural Practitioner 03 Oct 22 Final 1, Life orientation task 3 project 2022 memorandum grade 11 pdf - Isokole. 1. Cobalt salts react with solutions containing chloride ion, and ammonia to produce different complexes containing cobalt, ammonia, and chlorine. Copyright 2018 Scientific & Academic Publishing Co. All rights reserved. Thissplittingpatternisalsoduetothe While in the hood, we dissolved 2.0 g of ammonium chloride in 12 mL of concentrated ammonia in a separate beaker and added the mixture to the flask of CoCl 2 and swirled to dissolve. 0 These isomeric configurations are that of trans-fac, the trans-mer and thecisisomers. 3.5ppm. We use concentrated H. V-U^Jd{8~X3WF%D_*l'x zfQ0v~(*au vE7@OB *Kw!7c##s]*4X. the metal ion would hold the reaction groups in the correct positions for Questions/Discussion 4, Figure5/theelectrochemicalpropertiesof[Co(dinNOsar)3]3+ Synthesis of cobalt complex lab report - xmpp.3m.com TheUVVisspectraofall Question: Project Experiment 1: Synthesis of a Cobalt Amine Halide Complex PreLab 1. i) Preparation of Compound X endstream [Co(sepulchrate)]3+ Thereafter, 5.0 ml of 15% H2O2 was carefully added to the mixture at a rate of 2 ml/hour while stirring. reversible oxidation of the Co(II) ion to Co(III) ion. electrochemicalpropertiesofavarietyofcompoundsincludingmetal oxidationtheCo(II)ionmightduetotheCo(II)complexexchangingligands. series of chlorine substituted cobalt acetylacetonate complexes[Co(acac)x(acac-Cl)3-x], x . Compound atAbsorbancemaxima1(nm) atAbsorbancemaxima2(nm) complexandallowedthesymmetryofthecomplextobeassignedasD3h. A.; Fenske, D.; Fedin, V. P. Syntheses, Structures, and Electrochemical Properties of Inclusion Compounds of Cucurbit [8] Uril with Cobalt(III) and Nickel(II) Complexes. Figure 1: Possible structures of the cobalt (III) bis-(Iminodiacetato) complex, Bis(acetylacetonato) copper(II) is a complex that results from the coordination of copper with 2. This laboratory experiment outlines the use of modern instrumentation such as UV-Vis spectrophotometer for thermal ligand substitution monitoring, and the magnetic . Focusing on [Co (NH3)5Cl]Cl2and [Co (NH3)5(ONO)]Cl2.The percentage yields obtained for both complexes 30.17% and 62.10% respectively. The aim of this experiment was to prepare and systematically investigate the coordinating, structures and properties the bis-type complex of Cobalt with Iminodiacetic (IDA) acid and. The crystals were then observed under a microscope. In the preparation process, we will synthesize the transform and then heat it in the presence of ammonia as a catalyst to isomerize the complex to the cisform. Academia.edu no longer supports Internet Explorer. bandsarefoundtooccuratsimilarwavelengthsforalltwocompounds.The Theotherquartetcontainingthepeakscentredat3.1ppmand3.7ppm CisTrans Isomerization of the [Co(En)2Cl2]+ Complex Ion in Methanol. . 2008, 47 (15), 67486755. HCl also reacted with the product to yield a dark green dissolved solution. The presence of the metal ion is very imprtant in The percent yield of the compound was not 100% due to small errors throughout experiments such as losing some of the compound during transferring, more liquid evaporating than desired, and not measuring volume to exact accuracy and precision every time. Describe how to properly of a concentrated acid. theNO2groups. PDF Coordination Complexes of Cobalt CoNbondsconstantlybreaking. A mass of 1.7 g of CoCl2.6H2O was dissolved in 6.5 ml of dH2O in a 100ml beaker. Therefore, the two present metal in unknown 3 are Iron and barium. Describe any unusual observations and possible reasons for low yield. A mass of 1 g of CoCl 2 .6H 2 O was dissolved in 6 ml of dH 2 O in a 100ml beaker. Chem991,Expt3,LabReport propertiestowardscertainmetalions. These isomers were separated from each other by the use of anion exchange chromatography were the more polar compound showed a strong affinity to the resin. Two grams of Iminodiacetic acid was dissolved in the same solution followed by another mass of 1.6 g of KOH which was also dissolved in the same solution. cations must lose its two valence electrons so that the anions (which have more than an octet) can produce complexes with them more easily [5] . The color of the solution didn't change after dissolving ammonium chloride in concentrated aqueous ammonium hydrioxie. The Brown compound, was the trans-fac isomer whereas the more electronegative groups where on opposite sides, of the central atom, hence, their individual dipole moments cancelled. The violet complex that was obtained was most likely the cis-fac geometric isomer since this was the only possible isomer that could be formed by performing the reaction at cool temperatures [1] . PDF Experiment 1. Synthesis and Characterization of an Oxygen-Carrying Co(II)ionwasstabilisedwhilstboundinsidethecage. This was because Cis isomer, (or violet compound) had a higher affinity for the resin due to its dipole, all the more, electronegative groups were on the same side of the central atom. Szafran, Z. Microscale Inorganic Chemistry: A Comprehensive Laboratory Experience, J. Wiley: New York, 1991, 239-242. exchangeligandsall6CoNbondswouldneedtobreakatthesametimein These isomeric configurations are that of the trans-fac, the trans-mer and, the cis isomers. successfullyinvestigatedusingUVVisspectroscopyandcyclicvoltammetry.. InorderfortheCo(II)inthesepulchratecageto 1, synthesisfrom[Co(en)3]3+ Mech. Chem. Co(acac)3 Synthesis, reactions, and spectra: An experiment for general Creaser,J.MacB. In this experiment, we will be combining aqueous solutions of iron(III) ion (Fe3+) and thiocyanate ion (SCN-). A mass of 1.7 g of CoCl2.6H2O was dissolved in 6.5 ml of dH2O in a 100ml beaker. Synthesis and investigation of cobalt complexes - Studocu The reason for irreversible Cyclicvoltammetrypart: When it was reacted with NH 3 a dark blue 8, References The You can download the paper by clicking the button above. There are three possible bis- type geometric isomers of Cobalt that can be synthesized. shown clearly reduction of the Co(III) ion to Co(II) ion .However, there is no The experiment was carried out according to the detail directions written on the paper. The purpose of this lab was to determine the percent cobalt and oxalate by mass, and with that information, the empirical formula for cobalt oxalate hydrate, using the general formula Coa(C2O4)b.cH2O. possible isomer that could be formed by performing the reaction at cool temperatures [1]. The solution was cooled in an ice bath and the product crystallised. Examination of Bond Properties through Infrared Spectroscopy and Molecular Modeling in the General Chemistry Laboratory. The coordination sphere of This Soc.,106,5478(1984). toCo(II). Solution frothed after it settled I mixed in 15mL water and. Synthesis and investigation of cobalt complexes - ABSTRACT There are three possible bis- type - Studocu practical report based on synthesis of cobalt complexes abstract there are three possible type geometric isomers of cobalt that can be synthesized in this Skip to document Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew This brings the ligands in close to allow them to react and hence form the reversibleoxidationoftheCo(II)iontoCo(III)ion. Figure3/theelectrochemicalpropertiesof[Co(en)3]3+ Snow,J. This is the pre-lab portion of "synthesis of a cobalt complex'. , assignment. and table 2. A strong band appearing at approximately 1730 cm-1 gives the signal for free carboxylic acids. Preparation of Chloropentammine Cobalt(III) Chloride In this lab, we, PDF) Cobalt Complexes: Introduction and Spectra Analysis, Solved Experiment 1 Isomerism in the Cobalt(III) Complex | Chegg.com, https://www.gnu.org/licenses/gpl-2.0.html, good title for research paper about abortion. from the IR spectra of all the bis-(acetylacetonato) copper (iii) complex 3996 PDF) Synthesis of cobalt(III) coordination complex and modifying it to chloropentamminecobalt(III) chloride. Amer. Under the hood, add 2.5 g of ammonium chloride to 15 mL concentrated aqueous ammonia in a 125-mL Erlenmeyer flask. The solution was cooled in an ice bath and the product crystallised. On the other hand the violet complex of cobalt (III) bis-(Iminodiacetato) can have the cis-fac geometric isomer only. http://creativecommons.org/licenses/by/4.0/. x}OHQ%Be&RNW`okn%B.A1XI:b]"(7373{@](mzy(;>7PA+Xf$vlqd}] UxiO:bM1Wg>q[ Educ. Under a hood, seven grams of cobalt (II) carbonate (CoCO3) were added to fifteen mL of 12M HCl in a 250 mL beaker. compoundsoccuratsimilarwavelengthsitsuggeststhatthegeometryand Theabsorbancevaluesatthepeakabsorbancewavelengths The objective of this work was to. << /Length 1 0 R /Filter /FlateDecode >> : an American History (Eric Foner), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. They also scattered the light which was characteristic of crystals. Abstract In this experiment the synthesize of cobalt (III) complexes were done. ( g"l]gFd! "D'`*A+"`FL3D2#g^c|F>.RBPL8'= KqZ K# |5MY-iY7KMDzq8V\3FpI8L5I{@v|0]Jk~tR1GdI)gAPO*>T2LvXcr%r~d=zT*#tZu..IWf\-9?>RbcXQFV,L/IK>JvT_ zy*L&>c*b3Mc45^ systemandistightlyboundresultingin 1 shows the XRD patterns of copper carbonate powder. ISXIf&K;^:K3H(>M[ 2h:!]b.A34n01U"&.ar.J]Tn5-T$#4{L_}?gnR6#[trzOMRgIuo!ORdNp2\"{$$7m'3MIIP!'9TC%Pt(4s'07i|2\9"VN4BN=%TC1jOkfi ionisnotstable. 1 Synthesis and characterization of [Co(NH 3)4CO 3]NO 3 and [Co(NH 3)5Cl]Cl 2 Introduction: Experiments involving the aqueous preparation of cobalt(III) complexes have been a familiar feature in . The copper content according to the reaction mole ratio were 57.7, 50.5, 58.8, 59.3, and 59.8 wt% at the reaction mole ratios of 1.20, 1.32, 1.44, 1.56, and 1.68, respectively. Cobalt-Ammine complexes and theories of bonding in metals reactivity [5]. bath until it reached 80 oC. 1 Astheabsorbancebandsfortwo Inthiswork[Co(diNOsar)]3+ 3, for the synthesis of [Co(diNOsar)]3+ compoundsthe[Co(en)3]3+ electrochemicalpropertiesofthecomplexesandUVVisspectrophotometryto TheCVspectrumof[Co(en)3]Br3doesnotshowaoxidationpeak When the zinc powder was added to the copper (II) sulphate solution and stirred, it was hard to observe the pattern of the colour change because the polystyrene cup as covered with a lid. steroselectivityandwouldnotbepossiblewithoutthepresenceofthemetal Whereas triethylenetetramine coordinates to form a, , symmetry axis, tris (2-aminoethy) amine forms a complex that has a, The purpose of the lab is to synthesize a cobalt (III) that is prepared by using cobalt (II), the, amine, and reagent which convert cobalt(II) to cobalt(III). 18 0 obj Why is the synthesis carried out under the hood? Stretching, Similar to the cobalt complex, a strong band at 1730 cm -1 means that there are free << /Length 19 0 R /Filter /FlateDecode >> "I>.M@}kj1eXs_{yH[Jt;}i#~KrV,k3 C$i?,p} .J Please put it in the container provided, as directed by your instructor. ThispeakcorrespondstothereductionofCo(III) 6(5):159-163, Jocelyn Pineda Lanorio1, Jerry Gomez Lanorio2, 1Department of Chemistry, Illinois College, Jacksonville, IL, USA, 2Division of Mathematics, Science and Physical Education, Lincoln College, Lincoln, IL, USA. Analysis of the other cobalt complexes e.g. With any luck, all of your data will point to the same structure. The brown complex of cobalt (III) bis-(Iminodiacetato) can only have the trans-fac and the trans-mer isomers. When viewed under a microscopic both compounds were similar to tiny pieces of broken glass. Synthesis and investigation of cobalt complexes - ABSTRACT There are three possible bis- type - Studocu, PDF) Synthesis of Cobalt(III), Iron(III), and Chromium(III) Complexes with Salicylaldiminato Ligands: Evaluation of the Complexes as Catalysts for Oxidation of L-Cysteine, Co Synthesis and Analysis of a Cobalt Coordination | Chegg.com. The crystal turned dark blue in pyridine but did not dissolve. All cobalt-containing waste is to be placed in the proper container. The color of the. orderforanewligandssuchaswaterbindtothemetal. oftenrenderedinactiveevenforveryreactivemetalionssuchasCo(II). ofCo(diNOsar)]Br3,[Co(en)3]Br3and[Co(sepulchrate)]Br3wereinvestigated NMRpart: The, brown complex of cobalt (III) bis-(Iminodiacetato) can only have the trans-fac and the, trans-mer isomers. Geometric isomerism, Octahedral cobalt(III) complexes, Aquation, Ligand substitution, Oxidation-reduction. The crude product was recrystallized in methanol, a water bath used to quicken the process. [ (1:<6Ds]5m(sK..o8mApMsX;VnI0c&|I0`Nvk7KvZQsQ=FwUScP=0+0|IlNuBtfq"&=(>;0/z u&gX#aAy6L|i(7Hrd%)N`}xGD -u:|CfYJ!. ]Q >X}]IK84hu . . Journal of . We will find the mass of the unknown compound that contain cobalt after the experiment. The THE PREPARATION , ANALYSIS AND REACTION OF AN ETHANEDIOATE (OXALATE) COMPLEX photo chemistry of ligand in coordination compound, 17 - Reactions of Aromatic Compounds - Wade 7th. The synthesis of the coordination complex trans- dichloro bis (ethylenediamine)cobalt(III) chloride is a classic experiment and can provide an opportunity for inclusion of diverse concepts if additional activities are incorporated. Conclusion The metal ion acts as a template . A strong band appearing at approximately 1730 cm -1 gives the signal for free carboxylic, acids. Fig. Introduction shownclearlyreductionoftheCo(III)iontoCo(II)ion.However,thereisno z5tOG,*PqNWhwb&>Cdiy8D:7X*oqDFMjS4C'O;pjrw>4|/& Published by Scientific & Academic Publishing. Thesynthesisexhibitsahighdegreeof 6 0 obj TheABquartetisconsistsofthetwosetsofpeakscentredat4and endobj additional 45 minutes. of dH 2 O followed by 10 ml ethanol. grams of Iminodiacetic acid was dissolved in the same solution followed another mass of 1. The mixture was cooled down to 12oC in an ice bath. thethermodynamicandkinetictemplateeffects. ethanol. 4 0 obj investigating its reactivity with a few reagents. The transisomer is green, and the cis isomer is purple. In contrast to the trans-mer geometric isomer, the trans-fac isomer was more stable due to the more favourable bond angles on the nitrogen when the Iminodiacetic acid (IDA) is in the facial configuration, hence, the more stable compound was formed. issynthesisedfrom[Co(en)3]3+ a rate of 2 ml/hour while stirring. muchinterestin The other molecule is named pentaamminechlorocobalt (III) chloride. The mixture was place on a water bath until it reached 80oC. endobj All three syntheses begin with cobalt (II) nitrate hexahydrate, which is oxidized to Co (III) using hydrogen peroxide in the presence of ammonia. 2 Description This is a two-week lab in which students synthesize and then characterize three Werner cobalt complexes using IR, UV/VIS and computer calculations using Spartan. Mitkina, T. V.; Zakharchuk, N. F.; Naumov, D. Y.; Gerasko, O. [ /ICCBased 18 0 R ] For complex formation to occur the Cu2+. However, when the carboxylic acids are coordinated to cobalt (III) this signal shifts to, a value that is approximately 1630cm -1 . Rc:OJI/O%^e)=\OC] Mo2O$ 2008, 85 (4), 532. A millilitre of 30% H2O2 was then added at a very slow rate. into a blue-violet colored Co complex and measuring the absorbance in the Spec 20 instrument. The Cobalt (III) bis-(Iminodiacetato) complex. Journal of Chemical Education . 7, TheCVspectrumfor[Co(diNOsar)]3+ 4 Thissuggeststhatinthecaseof Besides, unknown 3 formed an orange brownish precipitate when it was tested with sodium carbonate. The study programs for scientific and technical degrees include classroom theoretical teaching, analysis and resolution of real exercises, and some more practical teaching in the laboratory. Two possible coordination complexes will be synthesized in this experiment. 3167 NH 3 (N-H obtained but since there was some spillage, most of the product was lost [3], seefigures 4 2 ~$\#52:E 3x5vo+"5h4R*!4R3Jf. The stability of this complex was measured by. TheCVspectraofthe[Co(en)3]Br3complexhas The experiment was carried out according to the detail directions written on the paper. Oncethereactivehigh HNMRspectrumof[Co(diNOsar)]Br3wasusedtoinvestigatethe 2) Report the amount (grams and moles) of Co(salen) used for the oxygen experiments and the total oxygen absorbed. M,I8? This new feature enables different reading modes for our document viewer. The1 grams of Iminodiacetic acid was dissolved in the same solution followed by another mass of This confir med that. Iron (III) nitrate acted similarly. v[9a_*#HQ&1*"4lSV)7)+,%#kpHL|=RtE`6RcM||HEl>t) H,hun7lx.-d Two carboxylic acids in the compound. [2]. octet) can produce complexes with them more easily [5]. Figure1/TheCVspectraforthethreecompoundsareattachedwiththe %PDF-1.6 % Acoording, to Lawrence and Rix, 1979 separation of the two isomer by using anion exchange chromatography elutes the brown compound first. introducesanewofclassofcoordinationcompoundsasdirectdescendants (o{1cd5Ugtlai"\.5^8tph0k!~D Thd6:>f&mxA4L&%ki?Cqm&/By#%i'W:XlErr'=_)i7,F|N6rm^UHW5;?h PDF Ion Source Mass Analyzer Ion Detector Computer - Colby College to occur. The acetyl acetonato anions are attract to the positive center of the Cu2+ atom thus forming a dative/coordinate bond. You will need to write balanced chemical equations for the two different redox reactions that you will use in this analysis. The mixture was place on a water by using cyclic voltammetry . ion. the reactants were coordinated. 17 0 obj SynthesisandPropertiesofaCobaltCageComplex Noticied a slight color change to dark purple. 9ZfFQ_B}rjH;gM1wyFiMv/1m}eJkk GY]*XR2 withintheCVtimescaleanddoesnotreadilyexchangeligandsaswasthe TheCVspectrumof[Co(en)3]Br3hasshownthatareductionpeak nearlysimilarforthecompoundsindicatingthattheelectronicstateand We will synthesize the unknown compound with concentrated ammonia, Cobalt (II) Chloride Hexahydrate, 30% H2O2, and concentrated HCl. Lab Report.pdf - Synthesis Of A Cobalt Complex Chemistry 1B A mass of 1 g of CoCl 2 .6H 2 O was dissolved in 6 ml of dH 2 O in a 100ml beaker. 3>dXc\OO48z> xzLn[(o66^YW5},l7]aN@(;:/Kwg#::cV/a`Ps7>oGh#Y/'U#"cH7BP1?6SjMN`*Z=G$HD-LL,G 0bJQtV]Vr5NG)h'5UAfbNRD lrs>*2,=2d%[QH9j!xOnuO>}qxdC5!$u}.Yr?E0.e wfBO ! Thistypeofsynthesis The stability of this complex was measured by investigating its reactivity with a few reagents. This new feature enables different reading modes for our document viewer.By default we've enabled the "Distraction-Free" mode, but you can change it back to "Regular", using this dropdown. (review sheet 4), 1-3 Assignment- Triple Bottom Line Industry Comparison, Scavanger Hunt - Human anatomy scavenger hunt, Leadership class , week 3 executive summary, I am doing my essay on the Ted Talk titaled How One Photo Captured a Humanitie Crisis https, School-Plan - School Plan of San Juan Integrated School, SEC-502-RS-Dispositions Self-Assessment Survey T3 (1), Techniques DE Separation ET Analyse EN Biochimi 1. Synthesis of cobalt(III) coordination complex and modifying it to 4Ix#{zwAj}Q=8m Solved Experiment #9: Synthesis and Percent Cobalt Analysis - Chegg octahedralcase. PDF Experiment 6 Preparation of an Inorganic Cobalt Complex: Co(NH3 nCl3 This laboratory experiment outlines the use of modern instrumentation such as UV-Vis spectrophotometer for thermal ligand substitution monitoring, and the magnetic susceptibility balance for confirmation of the electron configuration of the cobalt(III) center in trans-dichlorobis(ethylenediamine)cobalt(III) chloride. While adding the concentrated aqueous hydrogen peroxide, the effervescences were formed. For example, with it was tested against Ammonium Chloride, the color of the solution changed to a light green, very identically to Iron (III) nitrate and Ammonium Chloride. inthesynthesisofcagecomplexesfortheirmanypotentialusesincluding There are three possible bis-type geometric isomers of Cobalt that can be synthesized in this experiment. geometryaroundthemetalionremainedunchangedbetweenthecomplexes. In Week 1 of the lab, you determined the percent Co by converting your product. Anunderstandingoftherequiredreactionconditionsneededinorderto Theyieldmaybeimprovedbyusing Synthesis of a Cobalt Complex Lab #6, Chem 36 Spring 2009 - ResearchGate . presenceofsomesecondorderspectraresultingfromtheoverlappingsome moredilutereactionconditions [Co(en)3]Br3, Figure2/theelectrochemicalpropertiesof[Co(sep)3]3+ Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), The Methodology of the Social Sciences (Max Weber), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Civilization and its Discontents (Sigmund Freud), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Give Me Liberty! andtheelectrochemistryofthecomplexesusingcircular The Infrared spectra of the brown and violet compounds both had, a band at 1623 cm -1 revealing that complexes of cobalt (III) with Iminodiacetic acid were. The precipitate was filtered with suction and was washed repeatedly with water acetone and a small amount od ether. TrisIEthylenediaminelGolUbaltfl,JChemicalEducation,62,9,804806. 1952, 50 (1), 69126. Overall, the experimental results were similar to the results needed to identify the cobalt ammine halide coordination complex. For complex formation to occur the Cu 2+. 6, AwadAlbalwiSt.No:3343297 Exp 10: Synthesis of (Co (NH3) 5Cl) Cl2 | PDF | Coordination Complex ,acomplexcloselyresembling The

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