Lewis-Base Adducts of Main Group 1 Metal Compounds. VIII Synthesis and Structural Characterization of 1:2 and 1:3 Adducts of Lithium Nitrate with Monodentate Nitrogen Bases

Crystallization of lithium(I) nitrate from 2-methylpyridine and 3, 5-dimethylpyridine yields 1:2 and 1:3 adducts respectively, characterized by single-crystal X-ray structure determination. The 1:2 adduct is a linear polymeric species with the lithium atom four-coordinated by two monodentate ligands and two oxygen atoms of O, O′-bridging nitrate groups; there are two crystallographically independent polymeric strands in the structure. The 1:3 adduct is mononuclear, again with four-coordinate lithium. The three Li-N distances range from 2•05(2) to 2•08(2) Å, while Li-O is 1•98(2) Å.