This contribution reports the synthesis of the novel tetradentate bisguanidine ligand 2Ј,2Ј-[ethane-1,2-diylbis(methylazanediyl)]bis(ethane-2,1-diyl)bis(1,1,3,3-tetramethylguanidine) (L1, TMG 2 dmtrien), which combines two weak amine and two strong guanidine donor functions. Two new copper(II) complexes were isolated and structurally characterized as complexes [Cu(TMG 2 dmtrien)][Br] 2 ·3MeCN (C1[Br] 2 ·3MeCN) and [Cu(TMG 2 dmtrien)][Cl] 2 ·3MeCN (C2[Cl] 2 ·3MeCN). The cations C1 and C2 [Cu(TMG 2 dmtrien)] 2+ show a square-planar coordination environment and are chiral with both enantiomers being observed in the unit cell. We investigated the * Prof. Dr. S. Herres-Pawlis

The synthesis of manganese complexes of the guanidinepyridine hybrid ligands DMEGqu (L1) and TMGqu (L2)

The guanidine-pyridine hybridligands N-(1,3-dimethylimidazolidin-2-ylidene)-2-(pyridine-2-yl)ethanamine (DMEGepy, L1) and 1,1,3,3-tetramethyl-2-(2-(pyridine-2-yl)ethyl)guanidine (TMGepy, L2) have been synthesized and characterized. The reaction of DMEGepy with CoCl 2 and TMGepy with CuI lead to the mononuclear complexes {N-(1,3-dimethylimidazolidin-2-ylidene)-

A series of iron(II) dithiocyanate complexes containing the tripodal ligands L, [Fe(L)(NCS) 2 ] (with L = 6-Me 2 tmpa, 6-Me 2 pmea, 6-Me 2 -Me 2 uns-penp, 6-Me 2 -uns-penp, Me 2 uns-penp, imine-uns-penp and TMG-uns-penp), analogous to the known SCO complex [Fe(tmpa)(NCS) 2 ] were prepared and investigated. It was possible to

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