One-dimensional chain crown ether complexes: Synthesis and crystal structure of [Na(18-crown-6)]₂[M(mnt)₂](M = Zn, Cd)

Abstract

The reactions of IR-crown-6 with Na₂[Zn(mnt)₂] and Na₂[Cd(mnt)₂] have been studied and the complexes [Na(18-crown-6)]₂[M(mnt)₂](M = Zn, Cd), are characterized by elemental

analysis, IR spectrum and X-ray diffraction analysis. <b>1</b> and <b>2</b> belong to monoclinic, space group c2/c<i> </i>with cell dimensions, <b>1</b>: a = 2.2418(6), b = 1.1359(3), c = 1.9887(6) nm,

β= 120.391 (4)^o, V = 4.368(2), nm³, Z = 4, Dcalcd = 1.399 Mg/m³,<i> </i>F(000) = 1920, R₁ = 0.0302, wR₂ = 0.0560 and <b>2</b>: a = 2.2547(6),<i> </i>b = 1.1412(3), c = 1.9938(6) nm, β=119.715(4)°, V = 4.455 nm³,<i> </i>Z = 4, Dcalcd = 1.442 Mg/m³, F(000)= 1992, R₁ = 0.0384,<i> </i>wR₂ = 0.0575. Two complexes display a one-dimensional chain of [Na(18C6)]⁺(complex cations and [M(mnt)₂]^2- (M = Zn, Cd) complex anion bridged by Na-O interactions between adjacent&nbsp; [Na(18C6)]⁺units respectively.