Published values of bond energies

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Article #1744

#1744

From: John Jones
Date: Wed, 27 Jan 1993 19:02

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I've been checking the values given for the energies of some common
chemical bonds in various textbooks, and have been surprised to find wide
variations in the values given.  For example, take the C-C, C=C and C[triple bond]C energies; I found the following values (in kJ/mol)

                              single              double       triple

Chemistry for                  347                 599          829
Science & Engineering,
Beck, Brown


Elements of Material           370                 680         890
Science and Engineering
van Vlack


Inorganic Chemistry           335                607          837
J.E. Huheey


CRC Handbook                   368                720          962



What is the cause of these discrepancies?  Suppose I actually needed to know the bond energies for some practical purpose, how would I come up with a reliable
figure?

John Jones

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Path: arc1-ca.pugleaf.net!sparky!uunet!crdgw1!rpi!batcomputer!cornell!uw-beaver!cs.ubc.ca!fornax!jones
From: jones@cs.sfu.ca (John Jones)
Newsgroups: sci.chem
Subject: Published values of bond energies
Message-ID: <1993Jan27.190213.27488@cs.sfu.ca>
Date: 27 Jan 93 19:02:13 GMT
Distribution: sci.chem
Organization: CSS, Simon Fraser University, Burnaby, B.C., Canada
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