Mono-o-semiquinonato mixed-halogenato tin(IV) complexes: EPR spectroscopic and X-ray investigations
作者:Ekaterina V. Ilyakina、Andrey I. Poddel’sky、Alexandr V. Piskunov、Nikolay V. Somov
DOI:10.1016/j.ica.2011.08.038
日期:2012.1
reaction of complexes 3 and 5 with tetraethylammonium bromide yields new compounds [Et 4 N] + [(3,6-DBSQ)SnCl 2 Br 2 ] − ( 7 ) and [Et 4 N] + [(3,6-DBSQ)SnBr 4 ] − ( 8 ) containing complex radical-anion. In the case of complex 7 , there are three isomers were found: with Cl,Cl ( A ), Cl,Br ( B ) and Br,Br ( C ) atoms in the apical sites. The molecular structures of 3 and 5 were confirmed by X-ray analysis
摘要一系列新的(3,6-DBSQ)SnHal 3·THF型(3,6-DBSQ为自由基阴离子3,6-二叔丁基-邻-苯并半醌)单(半)喹啉锡(IV)配合物通过用卤素氧化邻苯二酚(3,6-DBCat)SnHal 2(Hal = Cl(1),Br(2))合成。制备并详细表征了以下配合物:(3,6-DBSQ)SnCl 2 Br·THF(3),(3,6-DBSQ)SnCl 2 I·THF(4),(3,6-DBSQ)SnBr 3·THF(5),(3,6-DBSQ)SnBr 2 I·THF(6)。EPR光谱研究表明,络合物形成的几何异构体在顶端位置具有不同的卤化物配体。配合物3和5与四乙基溴化铵反应生成新化合物[Et 4 N] + [(3,6-DBSQ)SnCl 2 Br 2]-(7)和[Et 4 N] + [(3,6-DBSQ )SnBr 4]-(8)含有复合自由基阴离子。在配合物7的情况下,发现了三种