Endo- and exocyclic substitutions in alpha-P4S3I2

Authors
Hepp, A Blachnik, R
Citation
A. Hepp et R. Blachnik, Endo- and exocyclic substitutions in alpha-P4S3I2, HELV CHIM A, 82(12), 1999, pp. 2425-2431
Citations number
19
Categorie Soggetti
Chemistry & Analysis",Chemistry
Journal title
HELVETICA CHIMICA ACTA
ISSN journal
0018019X → ACNP
Volume
82
Issue
12
Year of publication
1999
Pages
2425 - 2431
Database
ISI
SICI code
0018-019X(1999)82:12<2425:EAESIA>2.0.ZU;2-2
Abstract
Two isomers each of alpha-P4S2SeX2 and alpha-P4SSe2X2 (X=Cl, Br) have been identified by P-31-NMR spectroscopy in mixtures obtained from thermal react ion of PX3 and P4S1.4Se1.6. Systematic changes in chemical shifts and coupl ing constants with electronegativity of the ligand by exocyclic substitutio n and with alteration of the molecular geometry by the replacement of sulfu r by selenium are reported.