Monodentate ligands aliphatic amines

Complexes of monodentate aliphatic amine oxides with the lanthanides have not been extensively investigated. The only series of complexes with a ligand of this type, Et3NO, has been reported by Pavlenko et al. (181). The complexes have the formula [Ln(Et3N0)6][Cr(NCS)6]-2H20. 

Addition of aliphatic amines (L) to [Cu(S2CNEt2)2] has been studied by ESR spectroscopy (1697). Initial formation of five-coordinate adducts is proposed, while over longer periods addition of more base affords complexes of the type [Cu(S2CNEt2)2L2], which are believed to contain four coordinate, square-planar, copper centers, with a trans disposition of monodentate dithiocarbamate ligands. 

The interaction between monodentate aliphatic and aromatic amines 156 takes place according to the same scheme, as well as diamine ligands, the spatial positions of the donor N atoms in which exclude the possibility of formation of chelate structures, for instance 160, 165, 166. In this respect, we note the synthesis of liquid amine complexes (diethyl- and triethylamine) with molybdenum dioxodichloride in hexane medium (3.9) [9] ... 

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