Template reactions with polynuclear complexes. The reaction of [Mo2(O2CCF3)4(PR3)2] (R = Ph, Et) with 2-aminobenzaldehyde |
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| Authors: | Arvind Sahajpal Peter Thornton |
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| Institution: | Department of Chemistry, Queen Mary College, Mile End Road, London E1 4NS, U.K. |
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| Abstract: | The binuclear molybdenum(II) complexes Mo2(O2CCF3)4(PR3)2] (R = Ph, Et) act as templates for the self-condensation of 2-aminobenzaldehyde to give a new class of complexes in which a hydride ion bridges two molybdenum(III) centres, each of which carries a tetradentate macrocyclic ligand (C). The new hydrido complexes Mo2(C)2 (H)(O2CCF3)3(PPh3)2] (I), Mo2(C)2(H)2(O2CCF3)2(PPh3)2] (II), and Mo2(C)2 (H)2(O2CCF3)2(PEt3)2]2 (V) exist in two or more isomeric forms as shown by their IR, 1H, 31P and 19F NMR spectra. Substitution with thiocyanate, nitrate and tetraphenylborate anions gives the new products Mo2(C)2(H)(CO)(NCS)3(PPh3)2] (III), Mo2(C)2 (H)2(O2CCF3)(NO3)(PPh3)2] (IV), Mo2(C)2(H)(O2CCF3)(PPh3)2](BPh4)2 (VI) and Mo2(C)2(H)2(O2CCF3)(PEt3)2](BPh4) (VII), which also exist in isomeric forms. |
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