Klf. Callaghan et al., POLYHEDRAL NONABORANE CHEMISTRY - AN UNSUSPECTED NEW ISOMERIC TYPE INTHE 9-VERTEX ARACHNO-B9H13L SYSTEM, Journal of organometallic chemistry, 550(1-2), 1998, pp. 441-444
NMR spectroscopy reveals that the preparation of conventionally-struct
ured 4-(ligand)-arachno-B9H13 species 1 by ligand exchange on 4-(SMe2)
-arachno-B9H13 1a is often accompanied by the formation of their hithe
rto unsuspected and unreported 5-(ligand)-arachno-B9H13 isomers 2, whi
ch can be isolated by chromatography. 5-(4'-PhC5H4N)-arachno-B9H13 2c
is characterised by a single-crystal X-ray diffraction analysis that a
lso reveals an interesting stacking of the organic aromatic residues i
n the solid state. (C) 1998 Elsevier Science S.A.