N,N'-Bis(2-hydroxybenzylidene)-2,2-dimethyl-1,3-propanediamine

Mononuclear and heterometallic dinuclear, trinuclear and dimer-of-dinuclear complexes derived from single- and double-compartment Schiff base ligands having a less utilized diamine

“…The ligand H 2 L 1 [81], H 2 L 2 [82] and H 2 L 3 [83], as well as the mononuclear compounds [Cu II L 2 ] [84] and [Cu II L 3 &(H 2 O)] [85], were synthesized by reported procedures. Elemental (C, H and N) analyses were performed on a Perkin-Elmer 2400 II analyzer.…”

{2,2′-[(2,2-Dimethylpropane-1,3-diyl)bis(nitrilomethylidyne)]diphenolato}dioxidomolybdenum(VI)

“…For related structures with O Mo VI O units and for synthesis, see: Arnaiz et al (2000); Holm et al (1996); Syamal & Maurya (1989). The crystal structure of the free ligand N,N 0bis(2-hydroxybenzylidene)-2,2-dimethyl-1,3-propanediamine was described by Corden et al (1996).…”

“…3. Resulting from the coordination of the tetradentate L ligand to the molybdenum ion, the chelate ligand is more twisted than the free ligand, with a larger dihedral angle between two phenyl rings of 75.2 (1)° compared to the free ligand with 68.7 (1)° (Corden et al, 1996).…”

“…The title compound was prepared by adding MoO 2 (acac) 2 and the ligand H 2 L (Corden et al, 1996) in the molar ratio 1:1 to 30 mL dry methanol, followed by refluxing the solution for 1 h. Small prismatic, yellowish crystals precipitated which were filtered off and recrystallized from acetonitrile to get a better crystal quality.…”

Two Schiff Base Ligands Derived from 1,2-Diaminocyclohexane

“…In the weighting scheme 0-2(F 2) = $2(C + R2B) + Moore & Wallbridge, 1996). Investigations within these laboratories into the coordination chemistry of the ligands (I) and (II) have prompted us to determine the structures of these free ligands, so that subsequent changes resulting from the coordination of a metal ion may be identified.…”