Copper(I) π-complexes with allyl derivatives of guanidine: Synthesis and crystal structure of the [(CH2=CH-CH2-NH=)3C]Cu3Cl 4-xBrx (x = 1.23) and [(CH2=CH-CH2-NH=)3C]Cu3Br 4 compounds

Filinchuk, Yaroslav
(1999) Russian Journal of Coordination Chemistry — Vol. 25, n° 8, p. 584-588 (1999)

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Crystal compounds [(CH2=CH-CH2-N=)3C]Cu3Cl 4-xBrx(x = 1.23) (I) and [(CH2=CH-CH2-NH=)3C]Cu3Br 4 (II) were prepared by ac electrochemical synthesis and structurally characterized [DARCh diffractometer, MoKα radiation, 1258 (I) and 1488 (II) reflections with F ≥ 4σ(F), R = 0.031 and 0.037 for I and II, respectively]. The crystals of the isostructural compounds are trigonal, space group R3, Z = 3. Unit cell parameters are a = 10.332(3), c = 13.990(3) Å, V= 1294(1) Å3 for I and a = 10.542(3), c = 14.326(3) Å, V = 1379(1) Å3 for II. The trigonal-pyramidal coordination sphere of the copper atom involves three halogen atoms and a C=C bond in the equatorial plane. The inorganic Cu3X4 - anions are positioned in axes 3 and combined with triallylguanidinium cations into layers by the Cu-(C=C) interactions. The length of the coordinated C=C bond is 1.35(1) Å in I and 1.34(1) Å in II. Net atomic charges are calculated for structure I. © 1999 MAEe cyrillic signK "Hayκa/Interperiodica".
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Filinchuk, Y. (1999). Copper(I) π-complexes with allyl derivatives of guanidine: Synthesis and crystal structure of the [(CH2=CH-CH2-NH=)3C]Cu3Cl 4-xBrx (x = 1.23) and [(CH2=CH-CH2-NH=)3C]Cu3Br 4 compounds. Russian Journal of Coordination Chemistry, 25(8), 584-588. https://hdl.handle.net/2078.5/67415 (Original work published 1999)