Bis(silylaminodiarylphosphoranylsilylmethyl-C,N)-tin(II) and -lead(II) complexes and their precursors; structures of H(LL′), H(LL″), Sn(LL″)2 and Pb(LL″)2; [LL′]− = [CH(SiMe3)P(Ph)2double bond; length as m-dashNSiMe3]−,

We report a series (a)–(d) of tandem reactions involving the conversion of: (a) 2CH2(SiMe3)P(Ph)2double bond; length as m-dashNSiMe3 [2H(LL′)] (III) into successively [Li(LL′)]2 (1a) and [Pb(LL′)2] (3a); (b) 1a in turn into {[Li(LL″)]2} (2) and [Pb(LL″)2] (4); (c) 1a successively into Sn(LL′)Cl (5) and [Sn(LL″)2] (6); (d) (1b) into (3b). Experimental details for the preparation and characterisation (including elemental analysis and multinuclear NMR spectra in C6D6 and EI mass spectra) of 1a, 2, 3a, 3b, 4, 6, III (a new synthesis) and IV are provided. The X-ray structures of crystalline 4, 6, III and IV are presented; those of 1a, 2 and 3a were previously published.