Copper (II) Complexes with N-(3-Hydroximino-2-methylbutan-2yl) methylamine (HL): Synthesis and Properties. Crystal and Molecular Structures of [Cu(HL)Cl_2] and [Cu(HL)(H_2O)_2SO_4]_n

摘要

Paramagnetic copper (II) complexes with N-(3-hydroximino-2-methylbutan-2-yl) methylamine (HL), namely, Cu(HL)Cl_2 (I), Cu(HL)(SO_4)2H_2O(II), and Cu(HL)(NO_3)_2(III), were obtained, The crystal structures of I and II were determined. The blue crystals of these compounds are monoclinic. For I (C_6H_(14)Cl_2CuN_2O): a = 8.820(1) A, b = 6.511 (1) A, c = 18.255 (2) A, #beta# = 92.86(1) deg; V = 1047.0(2)A~3, space group P2_1/c, #rho#_(calcd) = 1.679 g/cm~3, Z = 4 for R_1 = 0.0250; for II (C_6H_(18)CuN_2O_7S) : A = 9.999(2) A, b = 9.927 (2) A, c = 12.963 (3) A, #beta# = 106.37 (3) deg, V = 1234.5(4) A~3, space group P2_1/c, #rho#_(calcd) = 1.753 g/cm~4, Z = 4 for R_1 = 0.0324. Crystals of I have a molecular structure. The Cu coordination polyhedron is a square bipyramid (2N + 2Cl + Cl + Cl) due to additional contacts with two Cl atoms from the neighboring molecules. Structure II is built from polymeric chains. The environment of the Cu atom is a distorted cis-octahedron (2N + 2O(H_2O) + 2O(SO_4). Complexes I-II are characterized by IR and EPR spectroscopy.