953776-48-2Relevant academic research and scientific papers
Ligand effects in the syntheses and structures of novel heteroleptic and homoleptic bismuth(iii) formamidinate complexes
Brym, Markus,Forsyth, Craig M.,Jones, Cameron,Junk, Peter C.,Rose, Richard P.,Stasch, Andreas,Turner, David R.
, p. 3282 - 3288 (2008/02/10)
Metathesis reactions of the alkali metal formamidinates M(RNC(H)NR), M = Li or K; R = C6H3-2,6-Pri2 (L 1), C6H3-2,6-Et2 (L2); C6H2-2,4,6-Me3 (L3), C 6H3-2,6-Me2 (L4) or C 6H4-2-Ph (L5), with BiX3 (X = Cl or Br) gave a range of bismuth(iii) formamidinate complexes [Bi(L)Br(-Br)(thf)] 2 (L = L1, L4), [{Bi(L1)Cl 2(thf)}2Bi(L1)Cl2], [Bi(L) 2X] (L = L2, L5, X = Br; L = L1, X = Cl), and [Bi(L)3] (L = L2, L3). An analogous organometallic complex Bi(L1)2Bun was also isolated as a side product in one instance. Structural characterisation of the di-halide complexes show symmetrical dimers for X = Br, with two bromide bridges, and a coordinated thf molecule on each Bi atom, whereas for X = Cl a thf deficient species was crystallised, and has a weakly associated trinuclear array with two coordinated thf molecules per three Bi atoms. Complexes of the form Bi(L)2X (X = Br, Cl, Bun) and Bi(L)3 all have monomeric structures but the Bi(L)3 species show marked asymmetry of the formamidinate binding, suggesting that they have reached coordination saturation. The Royal Society of Chemistry.
