Low-dimensional compounds containing cyano groups. X. (Dicyanamido-κN¹)bis(1,10-phenanthroline-κ²N,N′)copper(II) perchlorate

Abstract

The title compound, [Cu(C(2)N(3))(C(12)H(8)N(2))(2)]ClO(4), represents a relatively rare class of compounds with dicyanamide coordinated in a monodentate manner. The structure is formed by the [Cu{N(CN)(2)}(phen)(2)](+) complex cation (phen is 1,10-phenanthroline) and an uncoordinated ClO(4)(-) anion. The Cu atom is five-coordinate, with a slightly distorted trigonal-bipyramidal environment. The dicyanamide ligand is coordinated through one nitrile N atom in the equatorial plane, at a distance of 2.033 (6) angstroms from the metal. The two axial Cu-N distances are similar [mean 1.999 (4) angstroms] and are substantially shorter than the remaining two equatorial Cu-N bonds [mean 2.087 (1) angstroms].

Synthesis, Crystal Structure Determination from X‐Ray Powder Diffractometry and Vibrational Spectroscopic Properties of Mg[N(CN)2]2 · 4 H2O

“…This is in contrast to the structure of anhydrous Mg[N(CN) 2 ] 2 where each N atom of the dicyanamide anion is bound to one magnesium ion. Other compounds with monodentate terminally coordinated dicyanamide ions are discussed in [17].…”

Ternary Phenolate-Based Thiosemicarbazone Complexes of Copper(II): Magnetostructural Properties, Spectroscopic Features and Marked Selective Antiproliferative Activity against Cancer Cells

“…In contrast, it has been crystallographically proven that the two Cu–N bonds of N,N-donor co-ligands in square pyramidal and octahedral complexes where they lie on the equatorial plane are virtually equivalent as neither is subject to the Jahn–Teller effect [ 54 , 55 , 56 , 57 , 58 ]. In addition, in the complex [Cu{N(CN) 2 }(phen) 2 ] + [ 77 ] with a distorted trigonal bipyramidal geometry at the metal centre, the phen Cu–N distances are virtually indistinguishable from each other as the Jahn–Teller effect does not apply. The copper(II) ion in [Cu{(3,5- t- Bu 2 )-sal4eT}(2,9-Me 2 -phen)] ( 1 ) is displaced out of the mean basal plane [N(1), S(1), O(1), N(4)] towards the apical phen N(5) donor atom by 0.1998(12) Å.…”

“…In contrast, it has been crystallographically proven that the two Cu-N bonds of N,N-donor co-ligands in square pyramidal and octahedral complexes where they lie on the equatorial plane are virtually equivalent as neither is subject to the Jahn-Teller effect [54][55][56][57][58]. In addition, in the complex [Cu{N(CN) 2 }(phen) 2 ] + [77] The five-coordinate geometry at the copper(II) centre arises from the tridentate coordination of the thiosemicarbazonate ligand with the donor atoms, namely phenolate oxygen, imine nitrogen and thio-enolate sulphur, arranged meridionally, and the bidentate coordination of the 2,9-Me2-phen co-ligand oriented nearly perpendicularly relative to the primary ligand. The axial-equatorial coordination mode of the pyridyl nitrogen atoms of As can be seen from Figure 5, [Cu 2 {(3,5-t-Bu 2 )-sal4eT} 2 (phen)] (2) exists in the crystal lattice as a centrosymmetric dimer of dinuclear molecular ternary complexes of copper(II) stabilised mainly by two types of intermolecular forces.…”