Crystal data for nickel and cadmium α-L-alaninates

Powder data for bis(α-L-alaninato)nickel(lI) tetrahydrate (monoclinic), bis(α-L-alaninato)cadmium(II) trihydrate (hexagonal) and bis(α-L-alaninato)cadmium(II) (orthorhombic) are reported. Ni(C₃H₆NO₂)₂.4H₂O: M_r = 306.9, C2, Cm or C2/m, a = 20.34(1), b = 6.48(9), c = 9.73(7) Å, β = 93.0(3)°, V = 1283(28) ų, Z = 4, D_m = 1.54(3), D_x = 1.56 Mg m⁻³, Cu Kα (λ = 1.5418 Å); Cd(C₃H₆NO₂)₂.3H₂O: M_r = 342.6, P3₁12, P3₁21, P3₂12 or P3₂21, a = 6.37 (1), c = 25.5(7) Å, V = 899(32) ų, Z = 3, D_m = 1.86(4), D_x = 1.90 Mg m⁻³, Cu Kα; Cd(C₃H₆NO₂)₂: M_r = 288.6, a = 5.45(2), b = 9.19(6), c = 18.08(4) Å, V = 907(11) ų, Z = 4, D_m = 2.00(5), D_x = 2.11 Mg m⁻³, Cu Kα. The JCPDS Diffraction File Nos. are: 33-1991 for Ni(C₃H₆NO₂)₂.4H₂O; 33-1992 for Cd(C₃H₆NO₂)₂.3H₂O; 33-1993 for Cd(C₃H₆NO₂)₂.