Gallium transition metal complexes

Metallotropic rearrangement, in mercury tri-azenide complexes, 30 41 Metals, see also Heterobimetallics specific element Transition metal complex alkoxides, 15 159-297 of actinides, 15 290-293 of alkali metals, 15 260-263 of alkaline earths, 15 264-266 of aluminium, 15 266-272 of beryllium, 15 264-266 double type, 15 293-294 of gallium, 15 266-272 of lanthanides, 15 290-293 of magnesium, 15 264-266 properties of, 15 260 of transition metals, 15 272-290 trialkylsilyloxides, 15 295-297 of zinc, 15 264-266... 

The early collaboration between Gray and Bendix, like that between Ballhausen and Gray, involved the development of electronic and molecular descriptions of novel transition metal complexes. During his fellowship at Caltech, Bendix examined the manganese [22, 23] and gallium [24] complexes of a class of porphyrinoid macrocycles known as corroles [25-28]. Corroles were once difficult to prepare in the laboratory, but they have become more accessible due to the development of new syntheses [29-37]. According to a Scifinder [38] search performed on June 5, 2011,... 

Transition-metal complexes have also been prepared in methanol solution from P0(NH2)3, and 1 1 complexes of both gallium trichloride and bromide form... 

Oxidative addition at electron-rich transition metal centers has been exploited as an alternative route to transition metal complexes of Group 13 ligands. Sources of the highly reactive 14-electron species [Pt(dcype)] react with gallium and indium trialkyls MR3 (M = Ga, In R = CH2 Bu, CH2SiMej) via oxidative addition of a M-C bond to give species of the form (dcype)Pt(R)(MR2) (43-46, Scheme 13.4) [219]. 

Indium and gallium coordination compounds containing phosphine ligands have recently aroused interest for their widespread application as intermediates in the preparation of the Group 13 - Group 14 semiconductors [4], Since the early reports about compounds with transition metal-indium bonds [51, relatively little research has been reported in this field. However there is a growing interest in the coordination chemistry and structural features of heterometallic indium [6] and gallium complexes [7] which are also attractive as potential precursors of new materials with particular properties. 

Coordination chemistry of ER The monomeric fragments E-R are isolobal to carbon monoxide, and many complexes analogous to transition metal carbonyls have been synthesized (41 to 43, see Figure 2.3-7) [68], In most cases these reactions started with those clusters which have a high tendency to dissociate and to form monomers, such as pentamethylcyclopentadienylaluminum(I) or the alkylgal-lium(I) or alkylindium(I) derivatives. Often the products are isostructural to the respective metal carbonyls, but exceptions are the gallium compounds 44 and 45. 

Molten aluminium and gallium fluxes have shown themselves to be excellent routes to complex ternary and quaternary intermetallic phases such as R-T-Al and R-T-Al-Si, R-T-Al-Ge (when Al is used as solvent) or R-T-Ga, R-T-Si, R-T-Ga-Si, R-Ga-Ge (when Ga is used as solvent), where R = rare earth metal, T = transition metal. 

Recently, the oxidative addition of C2-S bond to Pd has been described. Methyl levamisolium triflate reacts with [Pd(dba)2] to give the cationic palladium complex 35 bearing a chiral bidentate imidazolidin-2-ylidene ligand [120]. The oxidative addition of the levamisolium cation to triruthenium or triosmium carbonyl compounds proceeds also readily to yield the carbene complexes [121], The oxidative addition of imidazolium salts is not limited to or d transition metals but has also been observed in main group chemistry. The reaction of a 1,3-dimesitylimidazolium salt with an anionic gallium(I) heterocycle proceeds under formation of the gaUium(III) hydrido complex 36 (Fig. 12) [122]. 

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