Four copper(II) complexes with potentially tetradentate tripodal ligands.

The four title Cu(II) compounds are chloro[(2-furylmethyl)bis(2-pyridylmethyl)amine-N,N',N"]copper(II) perchlorate, [CuCl(C(17)H(17)N(3)O)]ClO(4), (I), chloro{2-[bis(2-pyridylmethyl)amino]ethanolato-N,N',N",O}copper(II) hemi[tetrachlorocopper(II)], [CuCl(C(14)H(17)N(3)O)][CuCl(4)](1/2), (II), chloro[(2-morpholinoethyl)bis(2-pyridylmethyl)amine-N,N',N",N"']copper(II) perchlorate, [CuCl(C(18)H(24)N(4)O)]ClO(4), (III), and chloro[(2-piperidinylethyl)bis(2-pyridylmethyl)amine-N,N',N",N"']copper(II) hexafluorophosphate, [CuCl(C(19)H(26)N(4))]PF(6), (IV). They have tripodal potentially tetradentate ligands. In (I), the O atom of the furan moiety weakly coordinates to the Cu atom at a distance of 2.750 (3) A.

micro-Acetato-O:O'-bis{[bis(salicylidene)ethylenediaminato]manganese(III)} perchlorate.

In the title complex, [Mn(2)(C(16)H(14)N(2)O(2))(2)(C(2)H(3)O(2))]ClO(4), two [Mn(salen)] moieties [salen is bis(salicylidene)ethylenediamine] are connected through a micro-acetate bridge in a syn-anti fashion. The Mn.Mn distance is 5.365 (1) A.

micro-Chloro-bis{[benzylbis(2-pyridylmethyl)amine-kappa(3)N]chlorocopper(II)} perchlorate hemihydrate.

In the title dinuclear Cu(II) compound, [Cu(2)Cl(3)(C(19)H(19)N(3))(3)]ClO(4).0.5H(2)O, the coordination geometry around the Cu atoms is square pyramidal, with the bridging Cl atom at the apical positions. The Cu-Cl-Cu angle is 136.9 (1) degrees and the Cu.Cu distance is 4.961 (1) A.

Redetermination of bis{[(2-hydroxyphenylmethyl)bis(2-pyridylmethyl)aminato]copper(II)} diperchlorate.

The structure of the title compound, [Cu(2)(C(19)H(18)N(3)O)(2)](ClO(4))(2), was reported with insufficient accuracy because of a twinning problem by Adams, Bailey, Campbell, Fenton & He [J. Chem. Soc. Dalton Trans. (1996), pp. 2233-2237]. The dinuclear phenolate-bridged Cu(II) complex has an inversion centre.