Synthesis and study of Cu(NO 2 ) 2 (NH 3 ) 4 and Cu(NO 2 ) 2 (NH 3 ) 2

Abstract

International audienceCrystals of Cu(NO2)2(NH3)4 and Cu(NO2)2(NH3)2 have been prepared and studied. Two allotropic species exist for each compound, alpha-Cu(NO2)2(NH3)4 is orthorhombic, space group Fmmm or Fmm2; a(Ǻ) = 20.671(15), b(Ǻ) = 6.796(5), c(Ǻ) = 11.414(8), Z = 8; beta-Cu(NO2)2(NH3)4 is orthorhombic, space group Cccm or Ccc2; a(Ǻ) = 10.467(7), b(Ǻ) = 17.766(9), c(Ǻ) = 13.700(9), Z = 12; alpha-Cu(NO2)2(NH3)2 is triclinic, space group P-1, a(Ǻ) = 4.4165(12), b(Ǻ) = 5.6104(14), c(Ǻ) = 6.088(2), alpha° = 78.45(3), beta° = 103.95(3), gamma° = 100.16(3),Z = 1; beta-Cu(NO2)2(NH3)2 is monoclinic space group Cm or C2; a(Ǻ) = 9.226(6), b(Ǻ) = 7.556(3), c(Ǻ) = 4.486(3), beta° = 104.84(6), Z=2