Supramolecular Architecture in Nickel(II) Polyamine Tetracyanoquinodimethanido Systems
Citations Over TimeTop 17% of 1997 papers
Abstract
Three different supramolecular architectures corresponding to [Ni(dien)2](TCNQ)2 (dien = 1,4,7-triazaheptane; TCNQ = 7,7,8,8-tetracyanoquinodimethane), [Ni(trien)(TCNQ)2] (trien = 1,4,7,10-tetraazadecane), and [Ni(cyclam)(TCNQ)2] (cyclam = 1,4,8,11-tetraazacyclotetradecane) have been prepared and crystallographically characterized: [Ni(dien)2](TCNQ)2, triclinic, P1̄, a = 8.319(2) Å, b = 9.074(2) Å, c = 11.145(3) Å, α = 80.91(2)°, β = 74.10(2)°, γ = 82.12(2)°, Z = 1; [Ni(trien)(TCNQ)2], orthorombic, Pccn, a = 22.677(7) Å, b = 7.888(5) Å, c = 15.801(3) Å, Z = 4; [Ni(cyclam)(TCNQ)2], triclinic, P1̄, a = 8.699(2) Å, b = 9.752(3) Å, c = 10.138(2) Å, α = 87.29(2)°, β = 77.14(2)°, γ = 75.00(2)°, Z = 1. All of them are built by dimeric units (TCNQ)22- which are out of the coordination sphere in [Ni(dien)2](TCNQ)2 and σ-coordinated to the metal in cis and trans positions in [Ni(trien)(TCNQ)2] and [Ni(cyclam)(TCNQ)2], respectively. In the two latter compounds the bonded dimeric units (TCNQ)22-, formed by intermolecular interactions, give rise to infinite chains consisting of alternating [Ni(N4)]2+ and (TCNQ)22- moieties in the crystal. The existence of hydrogen bonds between the TCNQ nitriles and amine groups belonging to the metal fragments stabilizes the supramolecular architecture, increasing the dimensionality of the interactions. The spectroscopic and magnetic properties are discussed according to the structural models.
Related Papers
- → Syntheses, structures and bonding of 3d metal alkynyl complexes of cyclam and its derivatives(2019)23 cited
- → Study of M(iii)-cyclam (M = Rh, Ru; cyclam = 1,4,8,11-tetraazacyclotetradecane) complexes as novel methanol resistant electrocatalysts for the oxygen reduction reaction(2020)14 cited
- → Effects of Steric Constraint on Chromium(III) Complexes of Tetraazamacrocycles, 2. Comparison of the Chemistry and Photobehavior of the trans-Dichloro- and trans-Dicyano- Complexes of Cyclam, 1,4-C2-Cyclam, and 1,11-C3-Cyclam(2005)20 cited
- → Magnetostructural examination of Mn(III) complexes [Mn(cyclam)X2]+ with strong axial ligands(2009)5 cited
- → Complexation of C-Functionalized Cyclams with Copper(II) and Zinc(II): Similarities and Changes When Compared to Parent Cyclam Analogues(2021)