851005-20-4Relevant academic research and scientific papers
Structural variety and multiple isomerism in 1-(dimethylamino)propyl-2- chalcogenolate and 2-(dimethylamino)propyl-1-chalcogenolate complexes of palladium(II) and platinum(II): Synthesis, spectroscopy and structures
Dey, Sandip,Kumbhare, Liladhar B.,Jain, Vimal K.,Schurr, Thilo,Kaim, Wolfgang,Klein, Axel,Belaj, Ferdinand
, p. 4510 - 4520 (2004)
Isomeric dichalcogenides [Me2NCH(Me)CH2E]2 [(N∩E**)2] and [Me2NCH 2CH(Me)E]2 [(N∩E*)2] (E = S, Se, Te) have been obtained by the reactions of NaSH or M′2E2 (M′ = Na or K) with Me2NCH2CHMeCl. The former reaction affords mainly (N∩E**)2 (E = S) while from the latter mixtures of (N∩E**)2 and (N∩E**)2 [referred to as (N∩E)2, E = S, Se, Te] were isolated, the ratios in the mixtures depending on the chalcogen. Reactions of (N∩E)Na with [M2Cl2(μ-Cl) 2(PR3)2] gave complexes (MCl(N∩E)(PR 3)] (M = Pd or Pt). These chiral, mixed-ligand complexes have been characterised by elemental analysis, IR, UV/Vis and NMR (1H, 13C, 31P, 77Se, 125Te, 195Pt) spectroscopy, and, in part, by X-ray structure analysis. The complexes display a typical pattern of mutually trans-oriented neutral (P and N) and anionic (Cl and E) donor atoms in an approximately square-planar environment. In contrast to the platinum(II) analogues, the X-ray structures of the complexes [PdCl(N∩E) (PMePh2)] (E = S or Se) revealed both a conformational isomerism of the five-membered chelate ring and, for Se, the co-crystallisation of complexes with both the N∩E* and N∩E** isomeric ligands. The thermal behaviour of some complexes has been investigated. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
