Crystal and molecular structure of C, N-{2-[(dimethylamino)methyl]phenyl} diphenyltin bromide

Synthesis of chiral organotins suitable for the preparation of asymmetric heterogeneous catalysts

“…29 Taking into account that di-and tri-benzyltin compounds are easily obtained from the reaction between benzyl chloride and tin metal, 26 we considered it convenient to carry out a study on the synthesis of the corresponding benzyl(−)-menthyltin derivatives. Thus, we determined that the alkylation of tribenzyltin chloride (8) with (−)menthylmagnesium chloride led to (−)-menthyltribenzyltin (9) in 80% yield ( Fig. 1, sequence E) without epimerization.…”

“…All the solvents and reagents used were analytical reagent grade. Triphenylmethyltin (1), 24 di(−)menthyldimethyltin (12), 25 tri(−)-menthyltin bromide (16), 15 (−)-menthylmethyltin dibromide (6), 14 tribenzyltin chloride (8), and dibenzyltin dichloride (10) 26 were prepared following known techniques. Full 13 C and 119 Sn NMR spectra of the new organotins are summarized in Tables 1 and 2.…”

Zinc(II) and cadmium(II) compounds with the 2-[(dimethylamino)methyl]phenyl ligand

“…to the right is not surprising, since the strain involved in the formation of a pseudo-tetrahedral MC2N2 kernel must be considerable for both zinc and cadmium, given that the bite angle N-M-C in related complexes has been found consistently to be close to 75" (e.g., 75.3" in Ph2LSnBr (8), 73" in CpLTi (20), and 77 " in L,InCI (3)). Recently van Koten et al (6) have used the chiral labelling technique (10) to show that the Hg-N coordination is stable on the nmr time scale at -70°C in LHgX compounds (X = CI, OAc), but becomes labile at higher temperatures.…”

“…Many of these compounds are derivatives of metals formally in a dl0 configuration, such as tin(1V) (I), germanium(1V) (2), indium(lI1) (3,4), thallium-(111) (3, mercury(I1) (6), and copper(1) (7). Particular attention has been paid to the coordination environment of the metal, both in the solid state (e.g., Sn (8), In (3), Cu (9)) and in solution (e.g. In (4), Hg (6), Cu (10)).…”

An intramolecularly stabilized arylboron dibromide

“…For example, use of the "two-arm" ligand 1 [2] has permitted the isolation of, e.g., monomeric aluminum and gallium dihydrides [3] and remarkably stable group 13 bis(azides) [4]. The "one-arm" ligand 2 [5] has proved useful for, e.g., the preparation of several intermetallic derivatives [6] and indium iodides with diverse solid-state structures [7].…”