Preparation and characterisation of bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)copper(II) complexes with diazaaromatic compounds. Part 1. Crystal structures and characterisation of several adducts with diazines

Abstract

The reactions of [Cu(hfac),] (Hhfac = 1,1,1,5.5,5-hexafluoropentane-2,4-dione) with diazines (tmpyz = 2.3.5-trimethylpyrazine, mpym = 5-methylpyrimidine and mpydz = 3-methylpyridazine) in light petroleum have been studied and the following complexes obtained: [{Cu( hfa~),}~(p-trnpyz)~] 1 b, mpym)] 2c. [Cu(hfac),(mpym),] 2d. and [Cu(hfac),(mpydz),] 3d. The crystal structures of 1 b, 2b and 3d have been determined. Although 1 b and 2b are both trinuclear complexes with bridging diazole

End-to-end Dicyanamido-bridged Heteronuclear Cu(II)/Na(I) Coordination Polymers: Synthesis, Electrochemical, and Magnetic Properties

“…The IR spectrum has three bands at 1653, 1640, and 1632 cm −1 in the C-O stretching region, and bands corresponding to the ν asym (C-N) stretching frequencies (1400-1300 cm −1 region) and the ν sym (C-N) stretch (950-900 cm −1 region) are also found in the spectrum. [15] The ν sym (C=N) stretching vibration with medium intensity appears at 1340 cm −1 for the complex. The characteristic IR band for the dicyanamide group of complex 1 appeared at 1604 and 1586 cm −1 , respectively.…”

Syntheses and Crystal Structures of Two One-Dimensional Chain Copper Benzoylacetone Complexes Bridged Through Azobispyridine Ligands

“…in Tables II and III, [17], Cu(acac) 2 (4,4 0 -bipy) [8], Cu(TTA) 2 (4,4 0 -bipy) [9], Cu(TTA) 2 (pyz) [10], [Cu(TTA) 2 ](btrz) [11] and Cu(hfac) 2 (pyz) [12] [9], Cu(TTA) 2 (pyz) [10] and [Cu(TTA) 2 ](btrz) [11], while shorter than the Cu-N distances in Cu(acac) 2 (4,4 0 -bipy) [8] and Cu(hfac) 2 (pyz) [12] and longer than those in some hfac copper complexes [13,14]. 4,4 0 -Azpy ligands are trans in Complex 1.…”

“…Many -diketonates such as acetylacetone, 1,1,1-trifluoro-3-(2-thenyl)acetone and hexafluoroacetylacetone complexes have been reported [8][9][10][11][12][13][14][15]. In the present work, by using a mixed ligand system containing a -diketonate ligand benzoylacetone (bzac) and 4,4 0 -azobispyridine (4,4 0 -azpy) or 3,3 0 -azobispyridine (3,3 0 -azpy) as a *Author for correspondence.…”

Double half-cubane copper(ii) complexes available from copper(ii) 1,1,1,5,5,5-hexafluoropentane-2,4-dionate dissolved in formamides

“…There have been numerous reports on the structure and magnetic properties of complexes containing [M(hfac) 2 ] (Hhfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dione). [1][2][3][4][5][6][7][8][9][10] Various N-and Odonors can ligate two vacant sites at the metal centers, giving oligonuclear and polynuclear complexes by use of pyrazines, pyrimidines, and related azaaromatic rings as a bridge. 1-6 Some paramagnetic bridging ligands, nitroxides and nitronyl nitroxides, attract much attention for their use in metal-radical hybrid magnets.…”