Synthesis and structures of β-diketiminatotin(ii) halides, an amide and of Sn(E)[{N(R)C(Ph)}2CH](NR2) (E = S or Se, R = SiMe3)
Abstract
Treatment of [Li(L1)]2
(1) or K(L2) (2) with SnX2 in Et2O yielded the heteroleptic β-diketiminatotin(II) halides Sn(L1)Cl (3a), Sn(L1)Br (3b) or Sn(L2)Cl (4), even when an excess of the alkali metal β-diketiminate was used [L1
=
{N(R)C(Ph)}2CH, L2
=
{N(R)C(Ph)CHC(But)N(R)}, R = SiMe3]. From 2 and half an equivalent each of SnCl2·2H2O and SnCl2, or one equivalent of SnCl2·2H2O, the product was Sn(L3)Cl (5) or Sn(L4)Cl (6), in which one or both of the N–R bonds of L1 had been hydrolytically cleaved; the compound Sn(L5)Cl (7) was similarly obtained from 1 and an equivalent portion of SnCl2·2H2O [L3
=
{N(R)C(Ph)CHC(But)N(H)}, L4
=
{N(H)C(Ph)CHC(But)N(H)} and L5
=
{N(H)C(Ph)}2CH]. The