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Cyanocobalamin


Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: José A. Martinho Simões

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Individual Reactions

C72H100CoN18O17P (solution) = Cyanocobalamin (solution) + Aluminum (solution)

By formula: C72H100CoN18O17P (solution) = C63H88CoN14O14P (solution) + Al (solution)

Quantity Value Units Method Reference Comment
Deltar124. ± 20.kJ/molAVGN/AAverage of 5 out of 6 values; Individual data points

C63H91CoN13O14P (solution) = Cyanocobalamin (solution) + Methane (solution)

By formula: C63H91CoN13O14P (solution) = C63H88CoN14O14P (solution) + CH4 (solution)

Quantity Value Units Method Reference Comment
Deltar155. ± 13.kJ/molKinSMartin and Finke, 1990solvent: Ethylene glycol; Please also see Martin and Finke, 1992. The reaction enthalpy relies on 172. ± 13. kJ/mol for the reaction activation enthalpy. The reaction refers to "base-on" cobalamine.

IR Spectrum

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner Copyright (C) 1987 by the Coblentz Society
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin THE SQUIBB INSTITUTE FOR MEDICAL RESEARCH
Source reference COBLENTZ NO. 5404
Date 1961/09/22
Name(s) 5,6-DIMETHYLBENZIMIDAZOLYL CYANOCOBAMIDE
State SOLID (0.51 mg / 200 mg KBr DISC)
Instrument PERKIN-ELMER 21 (GRATING)
Path length 0.055 CM (THICKNESS)
Resolution 2
Melting point >300 C

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Martin and Finke, 1990
Martin, B.D.; Finke, R.G., J. Am. Chem. Soc., 1990, 112, 2419. [all data]

Martin and Finke, 1992
Martin, B.D.; Finke, R.G., J. Am. Chem. Soc., 1992, 114, 585. [all data]


Notes

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