Powder study of poly[(μ₂-2,2-dimethylpropane-1,3-diyl diisocyanide)-μ₂-iodido-silver(I)]

Abstract

In order to explore the chemistry of the bidentate ligand 2,2-dimethylpropane-1,3-diyl diisocyanide and to investigate the effect of counter-ions on the polymeric structure of (2,2-dimethylpropane-1,3-diyl diisocyanide)silver(I) complexes, the title polymeric compound, [AgI(C(7)H(10)N(2))](n), was synthesized by treatment of 2,2-dimethylpropane-1,3-diyl diisocyanide with AgI. X-ray powder diffraction studies show, as expected, a polymeric structure, similar to the very recently reported Cl(-) and NO(3)(-) analogues [AgX(C(7)H(10)N(2))](n) (X = Cl(-) or NO(3)(-)). In the title structure, the Ag(I) centre is bridged to two adjacent Ag(I) neighbours by bidentate 2,2-dimethylpropane-1,3-diyl diisocyanide ligands via the NC groups to form [Ag{CNCH(2)C(CH(3))(2)CH(2)NC}](n) chains. The iodide counter-ions crosslink the Ag(I) centres of the chains to form a two-dimensional polymeric {[Ag{CNCH(2)C(CH(3))(2)CH(2)NC}]I}(n) network. This study also shows that this bidentate ligand forms similar polymeric structures on treatment with AgX, regardless of the nature of the counter-ion X(-), and also has a strong tendency to form polymeric complexes rather than dimeric or trimeric ones.

Poly[μ-bromido-μ-(2,2-dimethylpropane-1,3-diyl diisocyanide)-silver(I)]: a powder diffraction study

“…Treatment of AgBr with two equimolar amount of 2,2-dimethylpropane-1,3-diyl diisocyanide in dry EtOH at room temperature afforded a highly insoluble white powder (I) even in polar or coordinate solvents. These strongly gave an indication that the obtained compound (I) have a polymeric structure, which is very similar to the polymeric structure of Rukiah & Al-Ktaifani, 2009).…”

“…For the preparation of the bidentate ligand CNCH 2 C-(CH 3 ) 2 CH 2 NC, see: Al-Ktaifani et al (2008). For similar polymeric structures, see: Al-Ktaifani et al (2008); , 2009. For disocyano ligands and their coordination complexes, see: Harvey (2001); Sakata et al (2003); Espinet et al (2000); Moigno et al (2002).…”

Powder X-ray investigation of 4,4′-diisocyano-3,3′-dimethylbiphenyl

“…These new materials have been reported to have practical potential applications in different fields, such as semi-and photoconductivity and photovoltaic cells (Fortin et al, 2000). Very recently, in a series of publications we have utilized the bidentate ligand 2,2-dimethylpropane-1,3-diyl diisocyanide in the syntheses of the organometallic polymers [Ag(C 7 H 10 N 2 )(X)] n (X = Cl -, Br -, Ior NO 3 -) (Al- Al-Ktaifani & Rukiah, 2010;Rukiah &Al-Ktaifani, 2009), which have been completely characterized by X-ray powder diffraction studies, IR spectroscopy and micro-analysis. A major point of interest in the previously reported polymers {Ag(I)[CNCH 2 C(CH 3 ) 2 CH 2 NC]X} n (X = Cl -, I -, Bror NO 3 -) is their similar polymeric structures regardless of the counterpart anions.…”

“…For disocyano ligands and their coordination complexes, see: Harvey (2001); Sakata et al (2003); Espinet et al (2000); Moigno et al (2002). For the preparation of the bidentate ligand CNCH 2 C(CH 3 ) 2 CH 2 NC and its organometallic polymeric structures, see: Al-Ktaifani et al (2008); , 2009; Al-Ktaifani & Rukiah (2010). For chelate complexing, see: Chemin et al (1996).…”