Lead thiolates. The formation of water-soluble lead(II) thiolates and the crystal structure of 2-(Morpholin-4-yl)ethanethiolatolead(II) nitrate

Abstract

The solubilized thiolate ligand 2-(morpholin-4-yl)ethanethiolate, mes, and its ammonium conjugate acid, Hmes, form crystalline complexes Pb₂(Hmes)₃(N0₃)₄, Pb(mes)₂, Pb(mes)(N0₃), Pb(mes)- (O₂CCH₃) and Pb(mes)(O₂CCF₃). These lead(II) thiolate complexes are soluble in aqueous media. Crystals of Pb(mes)(NO₃) contain chains of alternating lead and bridging thiolate sulfur atoms [Pb-S 2.646(4), 2.793(4) Å], with the lead coordinated also by the tertiary nitrogen atom [Pb-N 2.61(1) Å]. The nitrate ions weakly bridge lead atoms along the chain [Pb-O 2.69(2), 2.88(2), 2.98(2), 3.03(2) Å]. Crystal data: Pbca, a l3.396(2), b 21.900(3), c 7.348(1) Å, Z 8(x PbSN₂O_4- C₆H₁₂), 1602 observed data, R 0.057.