Double O,C,O-chelated diorganotin(IV) derivatives

Chemistry of the Carba-closo-dodecaborate(−) Anion, CB11H12-

“…A diorganotin compound with the parent 1 as a counterion has been reported as being of ionic nature in the solid state and in acetonitrile solutions …”

The First O,C,S-Coordinating Pincer-Type Ligand and Its Application to the Synthesis of a Triorganotin Cation Stabilized by Two Different Donor Atoms

“…The utility of this ligand for the synthesis of the intramolecularly coordinated triorganostannylium salt {4- t -Bu-2-[P(O)(O- i- Pr) 2 ]-6-[P(S)Ph 2 ]-C 6 H 2 }SnPh 2 + PF 6 - ( 4 ) has been demonstrated, and, by MO calculations, the possibility to control the positive charge and its distribution in the cation by the identity of the coordinating donor atoms has been shown. This work contributes to the general understanding of structure and reactivity of organoelement-14 cations as a field of ongoing interest. − Given the fact that organotin-based Lewis acids , are catalysts for a variety of organic reactions, it even suggests the possibility for tailoring such catalysts by variation of coordinating donor atoms.…”

Di(imino)aryltin(iv) dichlorides as tectons for heterometallic coordination compounds

“…All these diorganotin(IV) dichlorides contain a distorted octahedral (C,E) 2 SnCl 2 core (E = O, N) as a result of intramolecular O→Sn or N imine →Sn interactions established trans to the chlorine atoms. The tin-oxygen distances in 1 [2.500(5)/ 2.475(5) Å] and 2 [2.431(7)/2.480( 7) Å] are in the range observed for 9 in which each organic ligand has a pendant arm involved in intramolecular O→Sn interaction. The O→Sn interactions in the dichlorides 1 and 2 are considerably stronger than in the tetraaryltin(IV) derivatives containing the same pendant arm ligands [O→Sn 2.825(6)/2.853 (10) 10 This behaviour is obviously due to the increased Lewis acidity of the metal atom with increasing number of chloride atoms attached to it.…”