Hexaphosphapentaprismane: a new gateway to organophosphorus cage compound chemistry.
Several independent synthetic routes are described leading to the formation of a novel unsaturated tetracyclic phosphorus carbon cage compound tBu4C4P6 (1), which undergoes a light-induced valence isomerization to produce the first hexaphosphapentaprismane cage tBu4C4P6 (2). A second unsaturated isomer tBu4C4P6 (9) of 1 and the bis-[W(CO)5] complex 13 of 1 are stable towards similar isomerization reactions. Another starting material for the synthesis of the hexaphosphapentaprismane cage tBu4C4P6 (2) is the trimeric mercury complex [(tBu4C4P6)Hg]3 (11), which undergoes elimination of mercury to afford the title compound 2. Single-crystal X-ray structural determinations have been carried out on compounds 1, 2, 9, 11, and 13.
al-Ktaifani
Mahmoud M
MM
School of Chemistry, Physics and Environmental Science, University of Sussex, Brighton, BN1 9QJ, UK.
Bauer
Walter
W
Bergsträsser
Uwe
U
Breit
Bernhard
B
Francis
Matthew D
MD
Heinemann
Frank W
FW
Hitchcock
Peter B
PB
Mack
Andreas
A
Nixon
John F
JF
Pritzkow
Hans
H
Regitz
Manfred
M
Zeller
Matthias
M
Zenneck
Ulrich
U