Crystal structure of bis(2-aminopyridinium)dimethyltetrachlorostannate(IV) and its formation by hydrolysis of dimethyltin dichloride

Article abstract of DOI:10.1016/0022-328X(88)80338-3

The structure of (C5H7N2)2 has been determined by X-ray diffraction.The compound crystallizes in the orthorhombic system, space group Pbca (No. 61), with unit cell dimensions a 15.585(2), b 17.561(2), c 7.088(1) Angstroem, and Z = 4.The structure consists of hydrogen-bonded chains of alternating ^2- anions and pairs of C5H7N2⁺ cations.Each trans-dimethyltetrachlorostannate(IV) octahedral unit is surrounded by four 2-aminopyridinium ions and is involved in ten hydrogen-bonding interactions with d(N-H...Cl) ranging from 3.242(12) to 3.463(12) Angstroem. 1H NMR data show that (C5H7N2)2 is formed along with 1,3-dichloro-1,1,3,3-tetramethyldistannoxane in the reaction of Sn(CH3)2Cl2 and C5H6N2 in moist CDCl3; the fact that hydrolysis of the dimethyltin dichloride takes place is related to the relatively high basicity and low coordinating tendency of 2-aminopyridine.