Synthesis and properties of novel ortho-metalated cobalt(I) and iron(II) complexes through Csp2-H bond activation of dibenzylphenylphosphine |
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| Authors: | Nazhen Liu |
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| Institution: | School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China |
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| Abstract: | Dibenzylphenylphosphine in the reaction with CoMe(PMe3)4 afforded complex (Me3P)3Co((ortho-C6H4)∩P(C6H5)(CH2C6H5))] (1) by Csp2-H activation via ortho-metalation with P atom as anchoring group. An unexpected dinitrogen iron(II) complex (Me3P)2(N2)Fe((ortho-C6H4)2∩P(C6H5))] (2) stabilized by two five-membered chelate rings as CPC]-pincer ligand was formed through the reaction of dibenzylphenylphosphine with FeMe2(PMe3)4 via double Csp2-H activation. The reactions of complexes 1 and 2 with carbon monoxide delivered carbonyl complexes (Me3P)(CO)2Co((ortho-C6H4)∩P(C6H5)(CH2C6H5))] (3) and (Me3P)2(CO)Fe((ortho-C6H4)2∩P(C6H5))] (4). An iodo methyl cobalt(III) complex (Me3P)2(Me)(I)Co((ortho-C6H4)∩P(C6H5)(CH2C6H5))] (5) was isolated through the reaction of 1 with iodomethane. The structures of 1, 2, 3, 4 and 5 were determined by X-ray diffraction. |
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| Keywords: | C-H activation ortho-Metalation Cobalt Iron Dibenzylphenylphosphine |
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