Gallium I iodide

Ultrasonic treatment of a mixture of elemental gallium and iodine in toluene yields a light green insoluble product described as gallium(I) iodide [36], However, it now seems to be dear, as a result of several experimental observations, that a mixture of subiodides of gallium is actually formed. Nevertheless, the green powder behaves like Gal in many reactions and has also been employed for the synthesis of tetrahedral tetragallium dusters [Eq. (2)] [37, 38]. 

Aluminium, 0048 Ammonium phosphinate, 4549 Barium phosphinate, 0210 f Benzaldehyde, 2727 1,4-Benzenediol, 2326 Bis(hydrazine)tin(II) chloride, 4064 Calcium acetylide, 0582 Calcium phosphinate, 3925 Chromium(II) chloride, 4046 Chromium(II) oxide, 4235 Chromium(II) sulfate, 4238 Copper(I) bromide, 0264 Diacetatotetraaquocobalt, 1774 Diisobutylaluminium hydride, 3076 f 1,2-Dimethylhydrazine, 0951 1,2-Diphenylhydrazine, 3511 Dipotassium phosphinate, 4425 f Ethanedial, 0719 f Formaldehyde, 0415 Formic acid, 0417 Gallium(I) oxide, 4405 Glucose, 2513 f Hydrazine, 4515 Hydroxylamine, 4493 Hydroxylaminium phosphinate, 4550 Hyponitrous acid, 4464 Iron(II) chloride, 4055 Iron(II) hydroxide, 4386 Iron(II) sulfate, 4393 Fead(II) phosphinate, 4526 Fead(II) phosphite, 4530 Fithium dithionite, 4682 Magnesium, 4685 Magnesium phosphinate, 4512 Manganese(II) phosphinate, 4514 f Methylhydrazine, 0500 Phenylhydrazine, 2366 Phosphinic acid, 4498 Phosphonic acid, 4499 Phosphonium iodide, 4510 Potassium, 4640 Potassium hypoborate, 0163... 

The formation of molecular complexes between aluminum trihalides and pyridine or alkylpyridines has been the subject of systematic studies.35,36 Calorimetric data yield bond dissociation energies D(X3Al—py) of 323, 308 and 264 kJ mol-1 for X = C1, Br and I, respectively, and this same order is found for alkylpyridine adducts, although the A1—N bond is weakened in the case of lutidine by the effects of steric hindrance. For gallium halides the values of D(X3M—py) are smaller 248, 237 and 195 kJ mol-1 for chloride, bromide and iodide adducts, respectively. 

The effect of metal promoter species on the rate of carbonylation of [Ir(CO)2l3Me] was tested. Neutral ruthenium iodocarbonyl complexes such as [Ru(CO)3I2]2, [Ru(CO)4I2] or [Ru(CO)2l2]n were found to give substantial rate enhancements (by factors of 15-20 for a Ru Ir ratio of 1 13 at 93 °C, PhCl). Indium and gallium triiodides and zinc diiodide had comparable promotional effects. By contrast, addition of anionic ruthenium(II) species [Ru(CO)3I3] or [Ru(C())2I,i]2 did not lead to any appreciable promotion or inhibition. This behaviour indicates that the ability to accept an iodide ligand is a key property of the promoter. Indeed, it has been demonstrated that an iodide ligand can be transferred from [Ir(CO)2l3Me] to neutral ruthenium or indium species [73,74]. 

Solutions of the gallium halides (Cl, Br, or I) in acetonitrile, benzene, or nitromethane, together with some binary solvent mixtures, have been investigated by Ga, Ga, and H n.m.r. spectroscopy. A major conclusion is that the solvation numbers of the Ga ion increase on passing from chloride to iodide in... 

The solid-state structure of bis(2,6-diphenylphenyl)gallium iodide, (2,6-Ph2C6H3)2GaI, displays the gallium atom in a somewhat distorted trigonal planar environment (C-Ga-C 134.3(3)°). The Ga-I bond distance of 2.550(1) A is unremarkable (Figure 4). 

Another example illustrating a different type of disorder is displayed in Figure 10.42. The reaction of the imininm salt [Me2N=CH2]Cl with gallium iodide, Gal , led to the dimeric [Mc2NCH2GaX2]2 (X = Cl, I) [37], The compound was crystallized, and some halogen positions were found to be occupied exclusively by... 

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