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Ferrocenecarboxylic anhydride: identification of a new polymorph
Author(s) -
Tazi Mehdi,
Roisnel Thierry,
Mongin Florence,
Erb William
Publication year - 2017
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s205322961701124x
Subject(s) - ferrocene , monoclinic crystal system , metallocene , molecule , hydrogen bond , crystallography , intermolecular force , chemistry , functional group , materials science , crystal structure , organic chemistry , polymer , electrochemistry , electrode , polymerization
A new monoclinic polymorph of ferrocenecarboxylic anhydride, [Fe 2 (C 5 H 5 ) 2 (C 12 H 8 O 3 )], was obtained. Three molecules are present in the asymmetric unit, two of them being nearly identical (r.m.s. deviation = 0.11 Å), with the Fe atoms on the same side of the anhydride functional group. In the third molecule, the two Fe atoms are located at opposite sides of the functional group (ferrocene–ferrocene pseudo‐torsion angle = 146.2°), a very unsual feature in metallocene anhydrides. A network of weak intermolecular hydrogen bonds was also disclosed.