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Stereoselectivity in Diphos Addition to Molybdenum Complex with Pyridine‐2‐thionate (pyS) and η 3 ‐Methallyl Coordinated Ligands
Author(s) -
Yih KuangHway
Publication year - 2003
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200300157
Subject(s) - chemistry , stereoselectivity , acetonitrile , pyridine , molybdenum , ligand (biochemistry) , methane , stereochemistry , medicinal chemistry , organic chemistry , receptor , catalysis , biochemistry
The conformational isomers endo ‐ and exo ‐[Mo{η 3 ‐C 3 H 4 (CH 3 )}(η 2 ‐pyS)(CO)(η 2 ‐diphos)] (diphos: dppm = {bis(diphenylphosphino)methane}, 2 ; dppe = {1,2‐bis(diphenylphosphino)ethane}, 3 ) are prepared by reacting the double‐bridged pyridine‐2‐thionate (pyS) complex [Mo{η 3 ‐C 3 H 4 (CH 3 )}(CO) 2 ] 2 (η 1 :η 2 :μ‐pyS) 2 , 1 with diphos in refluxing acetonitrile. Stereoselectivity of the methallyl, C 3 H 4 (CH 3 ), ligand improves the formation of the exo ‐conformation of 2 and 3 . Orientations and spectroscopy of these complexes are discussed.