Antimony(III) and bismuth(III) amides containing pendant N-donor groups - a combined experimental and theoretical study

N,N- and N,N,N-chelated antimony(III) and bismuth(III) chlorides L1-3MCl2 1-4 [for L-1: M = Sb (1), for L-2: M = Sb (2) and for L-3: M = Sb (3) and Bi (4)], containing ligands L1-3 derived from the pyrrole ring (where L-1 = C4H3N-2-(CH-N-2',6'-iPr(2)C(6)H(3)), L-2 = C4H2N-2,5-(CH2NMe2)(2), L-3 = C4H2N-2,5-(CH2NC4H8)(2)), were prepared by the treatment of lithium precursors with SbCl3 or BiCl3. Molecular structures of 1-4 were described both in solution (NMR spectroscopy) and in the solid state (single-crystal X-ray diffraction analysis). Structures of 1-4 were also subjected to a density functional theory study.