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Multidentate, Cyclic Phosphorus Ligands with a SiliconPhosphorus Backbone: Template Synthesis of a 1,4,7‐Triphospha‐2,3,5,6,8,9‐hexasilacyclononane and a 1,3,5,7,9,11‐Hexaphospha‐2,4,6,8,10,12‐hexasilacyclododecane
Author(s) -
Driess Matthias,
Faulhaber Markus,
Pritzkow Hans
Publication year - 1997
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199718921
Subject(s) - phosphorus , denticity , ligand (biochemistry) , chemistry , yield (engineering) , combinatorial chemistry , silicon , stereochemistry , crystallography , organic chemistry , crystal structure , receptor , materials science , biochemistry , metallurgy
The right template makes it possible : a one‐pot cyclocondensation starting from fac ‐[Mo(CO) 3 (PH 2 R) 3 ] (R = cyclohexyl), n BuLi, and 1,2‐dichlorotetramethyldisilane gives complex 1 in 48% yield. This is the first complex with a nine‐membered tridentate phosphorus ligand. The surprising “fusion” of two 1,3,5‐triphospha‐2,4,6‐trisilacyclohexanes in the presence of Cu I and Ag I triflates leads to binuclear complexes with an unprecedented hexadentate phosphorus ligand.