20143-32-2Relevant academic research and scientific papers
Crystal structure of bis(2-aminopyridinium)dimethyltetrachlorostannate(IV) and its formation by hydrolysis of dimethyltin dichloride
Valle, Giovanni,Gonzalez, Angeles Sanchez,Ettore, Renato,Plazzogna, Gualtiero
, p. 49 - 54 (1988)
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.
An X-Ray Crystallographic Investigation of the Structures of Pyrazine Adducts of Diphenyltin Dichloride and Dimethyltin Dichloride
Cunningham, Desmond,McArdle, Patrick,McManus, James,Higgins, Tim,Molloy, Kieran
, p. 2621 - 2628 (2007/10/02)
Reaction of SnPh2Cl2 with pyrazine (pyz) leads exclusively to the formation of an adduct having the bulk composition SnPh2Cl2*0.75pyz.It has a structure composed of layers in which zig-zag polymeric chains, (SnPh2Cl2*pyz)n, with six-co-ordinate tin, alternate with layers containing non-interacting molecules of (SnPh2Cl2)2*pyz, with five-co-ordinate tin.The Sn-N bond lengths are abnormally long; each tin atom in the polymeric chains has Sn-N bond lengths of 2.961(10) and 2.783(10) Angstroem, and the Sn-N bond length in (SnPh2Cl2)2*pyz is 2.683(11) Angstroem.Moessbauer spectroscopy does not identify the presence of the two tin sites in the solid whereas (119)Sn n.m.r. does.X-Ray crystallographic details are: space group Pbam (orthorhombic), a=14.935(2), b=13.409(3), c=14.959(3) Angstroem, Z=8(Sn), R=0.047 (R'=0.056) for 1 478 observed reflections with I > 3δ(I).Reaction of SnMe2Cl2 with pyrazine leads exclusively to formation of the adduct (SnMe2Cl2)2*pyz; the distannoxane (SnMe2Cl)2O is also formed if solutions are not protected from the atmosphere.The adduct has a chain polymeric structure with six-co-ordinate tin atoms alternatively linked by chloride ions and pyrazine molecules.The Sn-N bond length is abnormally long.The polymeric chains pack into well defined planes, with chains in alternate planes propagating in orthogonal directions.Crystallographic details are: space group P21/n (monoclinic), a=6.855(1), b=10.344(2), c=12.014(3) Angstroem, β=92.590(7) deg, Z=2, R=0.03 (R'=0.033) for 727 observed reflections with I > 3δ(I).
