Coordination Compounds of Transition-Metal Nitrates
with Formamide M^II(NO₃)₂ 2(HCONH₂) 2H₂O
(M^II = Cu, Cd, Co, Mn)

K. K. Palkina, V. T. Orlova, A. Yu. Smolentsev, and E. A. Frolova

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninski pr. 31, Moscow, 119991 Russia

Received January 16, 2003

Abstract—The compounds M^II(NO₃)₂ · 2(HCONH₂) · 2H₂O, where M^II = Cu (I), Cd (II), Co (III), and
Mn(IV), were synthesized and characterized by X-ray crystallography. For the two latter compounds, only the
unit cell parameters and space group were determined. The crystals of the compounds are isostructural, orthor-
hombic, space group P2(1)2(1)2(1); Z = 4; MoK radiation; for I, a = 7.013(6) Å, b = 7.966(3) Å, c =
17.574(5)Å, V = 981.8(9) ų , _calc = 2.122 g/cm³; for II, a = 7.446(1) Å, b = 8.252(1) Å, c = 17.542(2) Å, V=
1077.8(2) ų , _calc = 2.222 g/cm³; for III, a = 7.196(1) Å, b = 7.976(1) Å, c = 17.422(5) Å, V = 1000.0(3) ų;
for IV, a = 7.342(2) Å, b = 8.102(2) Å, c = 17.549(4) Å, V = 1044.0(4) ų. The compounds are promising stim-
ulators for plant growth.

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