Titlebook: Hydrogen Bonding by C—H Groups; R. D. Green Textbook 1974Latest edition R. D. Green 1974 bonding.chemical bond.hydrogen

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,The Nature of C—H Hydrogen Bonding, of 1920. While it was realised even then that certain groups containing hydrogen atoms show a propensity for forming weak bonds with electron-rich groups on the same or another molecule, the mechanism of formation of this bond has proven to be a considerable challenge.

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Experimental Techniques,en bonds involving C—H groups. For the interested reader, a more detailed description of these and other techniques is given in reference [309]. Therein, Pimentel and McClellan suggest that these may be divided into two broad classes:

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Introduction,In the now classic monograph by Pimentel and McClellan entitled . (309), the brief section concerned with the C—H groups was entitled ‘Do C—H Groups Form Hydrogen Bonds?’ The conclusions, for the compounds and classes of compounds considered, were as follows:

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https://doi.org/10.1007/978-1-349-02172-7bonding; chemical bond; hydrogen

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sp Carbon,—C bond moment of 3.80 × 10. C m [187, 371] (hydrogen positive). Hence, end-to-end interaction of HCN molecules is to be expected. The resultant C≡N bond length, 115.3 pm [319], is nearly identical to that for other nitrile bonds [175].

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