CH~CH~PP~~] complexes to yield C~~-M O ( C~)~( P~~P C H = C H~)~via an unusual C-0 bond cleavage, but react with the cis-Mo(CO),tPh2PO-(CH2CH20),PPh2) complexes to yield acyl complexes.The results from this and earlier studies indicate that metallacrown ethers formed from bis(P donor)-polyether ligands with sufficient numbers of oxygens and sufficiently large cavities are capable of solubilizing salts of alkali-metal cations in organic solvents, and thus these complexes may be useful as phase-transfer catalysts. The ease with which the metallacrown ethers form hard/soft bimetallic complexes suggested that related complexes may also be useful for the activation of small, bifunctional molecules. The type of bis(P donor)-polyether ligand used in these complexes will have significant effects upon the reactivities of the complexes and thus upon their usefulness in these various procases.
ChemInform Abstract Depending on the molar ratio of the reactants, the first stable complexes of Ga with the dihydridobis(pyrazolyl)borate ligand i.e. the compounds (III) and (IV) (96% yield), are obtained from GaCl3 (I) and the salt (II). Compound (III) (space group Cc, Z=4) represents a rare example of neutral five-coordinate Ga(III), especially with ligands containing N donor atoms.
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