The crystal structure of bisbiuret-cadmium chloride

Crystallographic studies of the biuret reaction. II. Structure of bis-biuret-copper(II) dichloride, Cu(NH2CONHCONH2)2C12

“…Within the accuracy of the determination, the bond lengths and angles of the biuret molecule in this complex are entirely consistent with those found in biuret hydrate (Hughes, Yakel & Freeman, 1961;Craven, Freeman & Sabine, 1966) and in its complexes with zinc (Nardelli, Fava & Giraldi, 1963), cadmium (Cavalca, Nardelli & Fava, 1960) and copper at high pH (Freeman, Smith & Taylor, 1961). From these structure analyses there are now available five sets of dimensions for biuret molecules (reviewed by Nardelli, Fava & Giraldi, 1963) and nine sets of dimensions for crystallographically distinct -NH-CO-NH2 groups.…”

The crystal structure of SbCl5.HCON(CH3)2

“…3.39 C1(2)-C1 (5) 3.40 C1(2)-C1 (6) 3.37 C1(3) -C1 (4) 3.34 C1(3)-C1 (6) 3.29 (5) 3.29 C1(4)-0 (7) 3.10 C1(4)-C (8) 3.24 C1(5)-C1 (6) 3.30 CI(5)-0 (7) 3"08 C1(5)-C (8) 3.28 C1(6)-O (7) 2.97 0(7) -C (9) 3.62 0(7) -C(10) 2-74 0(7) -Y(11) 2.24 C(8) -C(9) 2.42 C(8) -C(10) 2.44 C(9) -C(10) 2.57 Table 7 & Filimonov, 1961) and crystal structure determinations of adducts between CdCI2 and a number of amides (Cavalca, Nardelli & Coghi, 1957;Nardelli, Cavalca & Fava, 1957;Nardelli, Coghi & Azzoni, 1958;Cavalca, Nardelli & Fava, 1960) & Lindqvist, 1962;Lindqvist, 1963) have shown that the observed deviations from ideal octahedral coordination of the acceptor atom in the last two adducts can be interpreted as arising from two steric factors, the van der Waals radii of the ligand atoms and their distances from the antimony atom. The Sb-O bond length in the SbC15.…”

Structure of N,N',N''-triphenylbiuret

“…This value is not far from those (5-10 ° ) observed in [Cd(biuret)2]C12 (Cavalca, Nardelli & Fava, 1960), biuret.0.6H20 (Hughes, Yakel & Freeman, 1961), K2[Cu(biuret)E].4H20 (Freeman, Smith & Taylor, 1961), [Zn(biuret)z]C12 (Nardelli, Fava & Giraldi, 1963), [Cu(biuret)2]C12 (Freeman & Smith, 1966) Hyun, 1984;Pirkle & Simmons, 1983). The C1--N3 bond is significantly longer [1.447 (2)A] than the C8--N1 and C15--N2 bonds [1.423 (2) and 1.418 (2)A].…”