Cyanocobalamin


Reaction thermochemistry data

Go To: Top, IR Spectrum, References, Notes

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

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

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

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

Quantity Value Units Method Reference Comment
Δr124. ± 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
Δr155. ± 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

Go To: Top, Reaction thermochemistry data, References, Notes

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

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

IR spectrum
For Zoom
1.) Enter the desired X axis range (e.g., 100, 200)
2.) Check here for automatic Y scaling
3.) Press here to zoom

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

View scan of original (hardcopy) spectrum.

View image of digitized spectrum (can be printed in landscape orientation).

View spectrum image in SVG format.

Download spectrum in JCAMP-DX format.

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

Go To: Top, Reaction thermochemistry data, IR Spectrum, Notes

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

Go To: Top, Reaction thermochemistry data, IR Spectrum, References