Transition-Metal-Substituted Gallanes: Synthesis and Spectroscopic Studies of Highly Polar σ(M—Ga) Bonds,Structures of trans-(Ph3P)(CO)3Co—Ga[(CH2)3N(C 2H5)2]R (R = Cl,CH3) and (n5-C5H5)(CO)2Fe—GaCl2 [N(CH3)3] |
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Authors: | Roland A Fischer Alexander Miehr Thomas Priermeier |
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Institution: | Anorganisch-chemisches Institut der Technischen Universität München. Lichtenbergstraβe 4, D-85747 Garching |
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Abstract: | The salt elimination reaction of the transition carbonyl metal-lates L(CO)nM](Na/K) (M = Cr, Mo, W, Mn, Re, Fe, Co, Ni; L= CO, n5-C5R5, PR3; n= 1-4; R= alkyl, aryl) with the base-stabilized galliumhalides ClaGaR3 -a(Do) (R = H, alkyl, halide; Do = THF, N(CH3)3, NC7H13) or ClaGa(CH2)3N-R2](R)2 - a yielded almost quantitatively the transition metal-substituted, gallanes L(CO)nM]aGaR3 - a(Do) and L(CO)n-M]aGa(CH2)3NR2](R)2 - a, respectively. Residual halide functionalities in these complexes were selectively replaced by various other groups. The new compounds were characterized by means of elemental analysis, 1H-, 13C-, 31P-NMR, MS, and lR v(CO) data. The single-crystal X-ray structure analysis of trans-(Ph3P)(CO)3Co-Ga(CH2) 3N(C2H5)2](R)( 6s : R = Cl, 6t : R= CH3) showed s̀(Co-Ga) lengths of 237.78(4) and 249.5(1) pm, respectively. A short s̀(Fe-Ga) contact of 236.18(3) pm was found for (n5-C5H5)(CO)2Fe-Ga-Cl2N(CH 3)3] ( 5a ). Low-pressure MOCVD experiments were performed to give thin films of analytically pure CoGa alloy. |
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Keywords: | Organogallium complexes Cobalt-gallium bonds Iron-gallium bonds MOCVD CoGa thin films |
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