PSEUDOSYMMETRIC MOLECULAR SHAPE RESULTING IN DISORDER IN THE CRYSTALLINE STATE

Citation
A. Hornig et al., PSEUDOSYMMETRIC MOLECULAR SHAPE RESULTING IN DISORDER IN THE CRYSTALLINE STATE, Acta chimica Hungarica, 130(3-4), 1993, pp. 405-414
Citations number
15
Categorie Soggetti
Chemistry
Journal title
ISSN journal
02313146
Volume
130
Issue
3-4
Year of publication
1993
Pages
405 - 414
Database
ISI
SICI code
0231-3146(1993)130:3-4<405:PMSRID>2.0.ZU;2-1
Abstract
The structures Of [(C4Me4)NiL]PF6 and [(C5Me5)CrL]PF6 where L is the t ripod ligand [eta3-CpCo{P(O)(OEt)2}3]- were determined by single cryst al X-ray diffraction studies. The cations are expected to have point s ymmetry 1 (C1) or m (C(s)); in the crystal they show apparent 2mm (C2v ) symmetry and are disordered. An explanation for this behaviour is of fered by the fact that these molecules have a pseudosymmetric shape. A n approach for visualizing the shape and packing of medium-sized molec ules is presented.