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The reaction of tri(tert-butyl)plumbyl-lithium (1) with various phosphorus chlorides was studied. With diphenyl- and amino(phenyl)phosphorus chlorides the formation of hexa(tertbutyl) diplumbane (2) and tetraphenyldiphosphane (3) or the respective 1,2-bis(am ino)-1,2-diphenyl- diphosphanes [e. g. 5: amino = PhCH 2 ( t Bu)N] was dominant. The presence of at least one tert-butyl group at the phosphorus atom gave access to tri(tert-butyl)plumbyl-di(tert-butyl) phosphane (4) and to tri(tert-butyl)plumbyl-amino(tert-butyl)phosphanes [amino =  t Bu(H)N (6), Me(Ph)N (7), PhCH 2 (Me)N (8), PhCH 2 ( t Bu)N (9)] via the reaction of 1 with the corresponding phosphorus chlorides. Side products were again 2 and the corresponding diphosphanes, unidentified compounds, and in two cases, bis(phosphanyl)-di(tert-butyl)plumbanes [phosphanyl =  t Bu(H)N( t Bu)P (10), Me(Ph)N( t Bu)P (11)]. Trimethylplumbyl-benzyl(methyl)- amino(tert-butyl)phosphane (12) was prepared for comparison. All compounds were characterized by their  1 H ,  13 C,  15 N (9 ), 31 P and  207 Pb NMR data. The coupling constants  1 J( 207 Pb, 31 P) are large and negative, whereas the coupling constants  1 J( 207 Pb,  13 C) are small and can be of either sign. The coupling constants  2 J( 31 P-N- 13 C) of 6 - 12 indicate a preferred conformation of the substituents at phosphorus and nitrogen

Tri(Terf-Butyl)plumbyl-phosphanes, Synthesis and Multinuclear Magnetic Resonance