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13C CP-MAS NMR spectra and fluxional behaviour of [M2(ηHCCCMe2)(CO)4(ηC5H5)2]+ [BF4]− (M = Mo, W) complexes in the solid state

✍ Scribed by M. V. Galakhov; V. I. Bakhmutov; I. V. Barinov


Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
180 KB
Volume
29
Category
Article
ISSN
0749-1581

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✦ Synopsis


Abstract

Internal rotation about the C‐2–C‐3 bond was observed in the ^13^C CP‐MAS NMR spectra of the solid complexes [M~2~(ηHC^1^C^2^C^3^Me~2~)(CO)~4~(ηC~5~H~5~)~2~]^+^ [BF~4~]^−^ where M = Mo or W.


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## Abstract Reaction of [(η^5^‐C~5~H~5~)(CO)~2~M=P=C(SiMe~3~)~2~] [where M = Mo (2), W (5)] with the phosphaalkene __t__BuP=C(NMe~2~)~2~ (1a) afforded the η^3^‐1,2‐diphosphaallyl complexes [(η^5^‐C~5~H~5~)(CO)~2~M{η^3^‐__t__BuPPC(SiMe~3~)~2~}], [where M = Mo (3a); M = W (6)]. Similarly, 2 and CyP=C