Formation and Cleavage of Hydroxo-Bridged Binuclear Rhodium(III) Ammine Complexes.

Synthesis, Crystal Structure, and Magnetic Properties of a Ferromagnetically Coupled Difluoro-Bridged Dinuclear Chromium(III) Complex with a Substituted Tetrahydrosalen Derivative as Ligand

“…[CrL 8 F]2‚2C3H8O2. A mixture of H2L 8 (1.242 g, 2.5 mmol), trans-[Cr(py) 4F2]ClO4 (1.265 g, 2.5 mmol), and 2-methoxyethanol (60 mL) placed in a conical flask equipped with a condenser was stirred at 70 °C for approximately 15 min, during which time all solid dissolved.…”

“…As a continuation of our current studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] on thermodynamic, kinetic, magnetic, and electronic properties of di-, tri-, and tetranuclear complexes, we initiated 19,20 an investigation of oligomeric chromium(III) compounds with the tetrahydrogenated ligand H 2 [H 4 ]salen and its derivatives. We and others have for many years studied transition metal complexes of these ligands, [21][22][23][24][25][26][27][28][29][30][31][32][33] but only few chromium(III) complexes with salen 2- † Ligand abbreviations (see also Chart 1): H2L 1 ) tetrahydrosalen ) H 2[H4]salen ) N,N′-bis(2-hydroxybenzyl)-1,2-diaminoethane; H2L 2 ) N,N′bis(3-tert-butyl-2-hydroxy-5-methylbenzyl)-1,2-diaminoethane; H 2L 3 ) N,N′bis(2-hydroxybenzyl)-trans-(S,S)-1,2-cyclohexanediamine; H2L 4 ) N,N′bis(2-hydroxybenzyl)-cis-1,2-cyclohexanediamine; H 2L 5 ) N,N′-bis(3-tertbutyl-2-hydroxy-5-methylbenzyl)-trans-(S,S)-1,2-cyclohexanediamine; H 2L 6 ) N,N′-bis(3-tert-butyl-2-hydroxy-5-methylbenzyl)-cis-1,2-cyclohexanediamine; H2L 7 ) N-(3-tert-butyl-2-hydroxy-5-methylbenzyl)-N′-(1-(2-pyridyl)ethyl)-1,1-dimethyl-1,2-ethanediamine; H2L 8 ) ...…”