H. Schmidbaur, Sybille Lauteschläger, G. Müller
Feb 12, 1985
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0
Influential Citations
23
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Bis(diphenylphosphino)methane forms a 1:2 complex with triethylaluminium, but 1:1 complexes with trimethylaluminium, trimethyl- and triethyl-gallium, and chlorodimethylgallium. The trialkyl complexes have NMR-equivalent P(C6H5)2 groups in solution in the temperature range +20 to −80°C, probably because of a very rapid site exchange of the metal atoms. A single crystal X-ray diffraction study of the Me2GaCl complex (5) showed that in the solid the metal is coordinated to only one phosphorus atom. In this case a splitting of the 31P signal into an AB quartet could be observed in toluene solution below −60°C. Crystal data: monoclinic space group P21/c, a 11.172(3), b 10.431(2), c 24.881(6) A, β 115.26(2)°, V 2622.26 A3 at −40°C, d(calc) 1.316 g cm−3 for Z = 4. R = 0.057 and Rw = 0.054 for 280 parameters and 3181 observed reflections with I > 2.0σ(I). The GaP distance is 2.535(2) A.