Xiao-Wang Li

Disproportionation of Low Valent Indium Bromide: Synthesis and Molecular Structure of Bis (2, 6-Dimesityl-Phenyl) Indium Bromide, (2, 6-Mes2C6H3)2InBr (Mes = 2, 4, 6-Me3C6H2). When does Trigonal Planar Become T-Shaped?

Bis(2, 6-dimesitylphenyl) indium bromide, (2, 6-Mes2C6H3)2 InBr (Mes = 2, 4, 6-Me3C6H2), I, has been prepared and characterized by 1H NMR, elemental analyses, IR spectroscopy, and single-crystal X-ray diffraction. I may be approached by either of two synthetic routes. Whereas I may be readily prepared from reaction of indium (III) bromide with (2, 6-dimesitylphenyl) lithium in Et2O, it may also be approached by an interesting disproportionation of Br2In-InBr2 in the presence of (2, 6-Mes2C6H3) Li. The title compound crystallizes in the monoclinic space group P21/n (No. 14) with unit cell parameters a = 12.341 ((2)A, b = 20.799 (4) A, c = 16.512 (2) A, β = 101.18 (1)°, D calcd = 1.31 g cm −3, and V = 4158 (1)A3 for Z = 4. Refinement, based on 1661 observed reflections, converged at R = 0.072, Rw = 0.071. The In-Br bond distance is 2.505 (4) A. As the steric demands of the two bulky ligands are sufficient to result in a C-In-C bond angle of 157.3 (8)° — the widest angle reported for a three-coordinate indiu...

[Ga2Cl4(dioxane)2]x: molecular structure and reactivity of a polymeric gallium(II) halide containing two five-coordinate gallium atoms about a Ga–Ga bond

A polymeric 1,4-dioxane adduct of gallium(II) chloride, [Ga2Cl4(dioxane)2]x, containing two five-coordinate gallium atoms about a Ga–Ga bond [Ga–Ga 2.3825(9) A], reacts with 1,4-dilithiotetraphenylbutadiene affording an unusual Ga(II)–tetraphenylbutadiene complex.

Syntheses and molecular structure of organo-group 13 metal carbene complexes

Trimethylaluminium or trimethylgallium reacts with 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene 1 to afford the first organo-group 13 metal carbenes 2 (M = Al 2a, Ga 2b), which are characterized by elemental analyses, IR, 1H and 13C NMR spectroscopy, and single-crystal X-ray diffraction.

2,6-Bis(2,4,6-triisopropylphenyl)phenyl as an extraordinarily bulky ligand in organometallic chemistry. Synthesis and molecular structure of [(Mes*2C6H3)MCl2]2 (M = Ga, In; Mes* = C6H2Pri3-2,4,6)

Gallium chloride or indium chloride interacts with 2,6-bis(2,4,6-triisopropylphenyl)phenyllithium, (Mes*2C6- H3)Li (Mes* = C6H2Pri3-2,4,6), affording [(Mes*2C6H3)MCl2]2 (M = Ga 1, In 2), interesting group 13 organometallic crystalline dimers, characterized by elemental analyses, 1H and 13C NMR spectroscopy, and single-crystal X-ray diffraction.

Synthesis and Molecular Structure of (Mes2C6H3)B(Br)N(H)[i-Pr2C6H3)] and an ab initio Examination of CH3BBr2 and CH3B(Br)NH2

Reaction of (2,6-dimesitylphenyl)boron dibromide, (Mes2C6H3)BBr2. I, with [2,6-di-i-propylphenyl)amino[lithium, [(i-Pr2C6,H3)N(H)Li, affords 2,6-dimesitylphenyl](2,6-di-i-propylphenyl)amino]boron bromide, (Mes2C6H3)B(Br)N(H)[(i-Pr2C6H3)] II. II has been characterized by elemental analyses, 1H and 13C NMR, and single crystal X-ray diffraction. ab initio examination of model molecules CH3BBr2, III, and CH3B(Br)NH2, IV, supports a measure of π-bonding in the B‒Br and B‒N bonds in III and IV.

Synthesis, molecular structure, and reactivity of an Li2Br4 octahedrally stabilized organoaluminium bromide dimer

The synthesis, molecular structure, and reactivity of an unusual Li2Br4 octahedrally stabilized organoaluminium bromide dimer, [(Mes2C6H3)AlBr3Li]2, is described.

Synthesis and molecular structure of an unusual –Ga–Ga–Ga– linked organometallic

Reaction of [(2,4,6-Pri3C6H2)2C 6H3]GaCl2 with P(SiMe3)3 affords the unusual organometallic compound [(2,4,6-Pri3C6H2)2C 6H3]Ga{H2PGa(H)PH2}G a[C6H3(C6H2- Pri3-2,4,6)2] 1 characterized by multinuclear NMR, complete (C, H, Ga and P) elemental analyses, IR spectroscopy and single crystal X-ray diffraction; 1 is significant as it contains a rare Ga–Ga–Ga [2.5145(13) and 2.7778(14) A] linkage even as its formation is facilitated by the unusual stripping of the sterically demanding m-terphenyl ligand from the central gallium atom.