Abstract

Complexes of cobalt(II), cobalt(III) and rhodium(III) with TCEC and TAPC have been synthesised. TCEC with cobalt(II) gave [Co(TCEC)Br]Br and [Co(TCEC)Cl]Cl, five coordinate high spin square pyramid complexes, but the corresponding cobalt(III) complex could not be characterised. Rhodium(III) gave a six coordinate [Rh(TCEC)Cl2]Cl complex, in which the two coordinated chlorides have acis-geometry and the four pendant arms lie on one side of the N4 plane with none of the —C≡N groups coordinated TAPC on the other hand gives the cobalt(III) complex, [Co(TAPC)Br]Br2, in which one of the amino groups of the four pendant arms is coordinated to cobalt. Rhodium(III) with TAPC gave [Rh(TAPC)Cl]Cl2 in which one axial site is occupied by the amino group of one of the pendant arms and the other by Cl−.

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