Synthesis and characterization of di(p-fluorobenzyl)tin bis(heteroaromatic carboxylate) and crystal structure of di(p-fluorobenzyl)tin bis(3-pyridinecarboxylate)

摘要

Reaction of di(p-fluorobenzyl)tin oxide with heteroaromatic carboxylic acid in 1:2 stoichiometry yields compounds of the type (4-F-Bz)_2Sn(OOCR)_2 [R=3-pyridinyl (1),4-pyridinyl (2),2-pyridinyl (3),2-indolyl (4),2-furanyl (5),2-thiophenyl (6),3-indolyl (7),3-indolmethyl (8)].These compounds have been characterized by elemental analysis,IR,~1H and ~(119)Sn NMR spectra.The crystal and molecular structure of compound 1 has been determined by X-ray single crystal diffraction.The results show that the crystal of compound belongs to a monoclinic system with space group P2(l)/c and unit cell dimensions:a=17.634(12) A,6=12.776(9) A,c=13.606(9) A,beta=96.991(11) deg,Z=4,V=3043(4) A~3,D_c=1.269 Mg/m~3,mu=0.904 mm~(-1),F(000)=1456,R_1,=0.0405,wR_2=0.0682.In compound 1,the tin atom is seven-coordinate in a distorted pentagonal bipyramidal geometry by bridging the pyridine N atom,resulting the one-dimensional infinite chain organotin compound.