Coordination of (4S, 9S)-4, 9-diethyl-2, 11-dioxa-5, 8-diaza-1 lambda(5)-phospha-tricyclo[6.3.0.0(1.5)]undecane with retention of hydrophosphorane structure: Obtaining and characteristic features of adducts with BF3 and ZnCl2

Reactions of tricyclic hydrophosphorane, (4S, 9S)-4, 9-diethyl-2, 11-dioxa- 5, 8-diaza-1 lambda(5)-phospha-tricyclo[6.3.0.0(1.5)]undecane (1), with BF( 3)xEt(2)O and with ZnCl2 under mild conditions have been investigated. The phosphorane ligand in the complexes obtained (2 and 3, respectively) was fo und to maintain its tricyclic structure, while the BF3 and ZnCl2 groups coo rdinate to the apical nitrogen and oxygen atoms of the trigonal bipyramid o f phosphorane. The structure of the complexes has been evaluated by the fol lowing set of methods: IR and NMR B-11, C-13, F-19, P-31 spectroscopy mass- spectrometry, X-ray photoelectron spectroscopy, ultracentrifugation and ele mental analysis. Spectral peculiarities and dynamic behavior in different s olvents of compound 2 have been examined in detail.