
%0 Journal Article
%A Harvey, S 
%A Kildea, JD 
%A Skelton, BW 
%A White, AH 
%T Lewis-Base Adducts of Main Group 1 Metal Compounds. XV. Adducts of Lithium(I) Perchlorate With o-Methyl-Substituted Monodentate Pyridine Bases of Increasing Bulk
%J Australian Journal of Chemistry
%D 1992/07/01
%V 45
%N 7
%P 1135-1142
%K 
%R https://doi.org/10.1071/CH9921135
%U https://www.publish.csiro.au/paper/CH9921135 
%X Whereas recrystallization of CuIClO4 from the progressively bulky pyridine bases (L) pyridine ( py ), 2-methylpyridine (2-mpy) and 2,6-dimethylpyridine (2,6-dmpy) yields adducts of progressively diminishing base stoichiometry , n = 4, 3, 2 (in [CuLn ](ClO4)), recrystallization of LiClO4 from the same bases yields adducts [Li( py )4](ClO4) and polymeric, perchlorate -bridged Li(2-mpy/2,6-dmpy)2 ClO4). The former is tetragonal, I4 a 12.479(5), c 7.009(8) Å , Z 2, and isomorphous with the copper analogue; R was 0.057 for 324 'observed' reflections, and Li-N 2.O66(7)Å  [cf. Cu-N, 2.046(4) Å ]. Li(2-mpy)2(ClO4) is monoclinic, P21/c, a 16.004(4), b 10.020(3), c 8.831(5) Å, &#946; 99.56(3), Z 4, R 0.047 for 1402 'observed' reflections, while Li(2,6-dmpy)2(ClO4) is monoclinic, C2/c, a 22.089(9), b 10.067(5), c 15.715(6) Å , &#946; 110.54(3), Z 8, R 0.041 for 1991 'observed' reflections. The latter compounds have Li2N2O2 coordination environments about the metal of an irregular nature, presumably in consequence of ligand hindrance. 
