Synthese und Strukturen von Yttrium-tris[bis(trimethylsilyl)phosphanid] und 1, 1', 3, 3'-Tetrakis(trimethylsilyl)yttrocen-tri(tert-butyl)silylphosphanid
摘要:
The metalation of HP(SiMe3)(2) with Y[CH(SiMe3)(2)](3) gives the homoleptic {Y[P(SiMe3)(2)](3)}(2) (1) which crystallizes from toluene in the monoclinic space group P2(1)/c. The yttrium. atoms are in a distorted tetrahedral environment with Y-P bond lengths of 267.7 and 284.8 pm to the terminal and bridging substituents, respectively. The metathesis reaction of [1,3-(Me3Si)(2)C5H3](2)YCl with KPSitBu(3) yields (tetrahydrofaran-O)-1,1',3,3'-tetrakis(trimethylsilyl)yttrocene-tri(tert-butyl)silylphosphanide (2). The molecular structure of 2 in solution was deduced by NMR spectroscopy and X-ray crystallography. The coupling constants (1)J(Y,P) and (1)J(P,H) show values of 144.0 Hz and 201.0 Hz, respectively.