
%0 Journal Article
%A Engelhardt, LM 
%A Patrick, JM 
%A Whitaker, CR 
%A White, AH 
%T Lewis Base Adducts of Lead(II) Compounds. I. Polymer Isomerism in Some 1-2 Adducts of Lead(II) Halides With Pyridine Bases
%J Australian Journal of Chemistry
%D 1987/12/01
%V 40
%N 12
%P 2107-2114
%K 
%R https://doi.org/10.1071/CH9872107
%U https://www.publish.csiro.au/paper/CH9872107 
%X Recrystallization of lead(II) halides, PbX2 (X = C1, Br, I), from n- methylpyridine, n = 3, 4, yields crystalline 1 : 2 adducts; these have all been shown by single-crystal X-ray structure determination to contain the lead in an essentially octahedral six-coordinate environment, two of the coordination sites being occupied by monodentate pyridine base moieties and four by bridging halogen, yielding infinite polymeric arrays. For X = Cl, Br, n = 3, the nitrogen atoms lie cis in the coordination sphere; for the other complexes, they are trans. In the two cis complexes, distortion from ideal orthogonal geometry is more substantial than in the trans, possibly indicative of the presence of a sterically active 'lone pair'. 
