Copper complexes trigonal pyramidal

In their pursuit of modeling Type I copper proteins, Kitajima et al. reported112 a rare, tetrahedrally coordinated complex (105), which displayed an EPR spectrum consistent with the presence of the unpaired electron in the dz2 orbital.1 They also isolated a square-pyramidal DMF adduct (complex (106)). They were successful in providing structural proof of a copper(II) complex (trigonal pyramidal) with C6F5S -coordinated complex (107), with CuN3S chromo-phore.113 The X-ray analysis (poor data set) of a closely similar complex with Ph3CS as the... 

The structure of a copper(I) complex [Cu(L)][BPh4] (trigonal pyramidal three pyridyl groups in the trigonal plane and tertiary amine at the apex ligand as that in complex (4)) was also determined.29 The structure of complex [Cu2(L)(MeCN)2][BF4]2 (ligand as that in complex (179))169 and complex [Cu(L)][BPh]4 (ligand as that in complex (220)) 09 were also reported. 

Tolman and co-workers investigated the oxygenation behavior of a copper(I) complex (790) (trigonal pyramidal) and demonstrated the formation of end-on peroxo-dicopper(II) species.58... 

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