ISSN:
1573-9171
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The structure of m-carboranedicarboxylic acid dianilide and the products of its degradation, which takes place with the formation of the corresponding dicarbanido-undecaborate, was investigated, by vibrational spectroscopy. The dianilide exists in two crystalline modifications: in one, the amide groups are bound by intermolecular H bonds of the NH...OC type, and they remain free in the other. The carborane nucleus in dianilide can be split into dicarbaundecaborate in softer conditions than with unsubstituted carborane. In the protonated form, the H+[Ph-NH-C(O)-C2B9H10-C(O)-NH-Ph]− proton, which reacts with the -C(O)-C2H9H10-C(O)-fragment, destabilizes the nido polyhedron. In prolonged standing in air or in heating, the protonated form decomposes with the formation of acetanilide and an amorphous residue containing products of deeper decomposition of nido-carborane, including boric acid.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00965423
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