title: Diamondoid-Type Copper Coordination Polymers Containing Soft Cyclodiphosphazane Ligands.
abstract: Three novel coordination polymers have been synthesized by reacting cis- and trans-alkyne-appended cyclodiphosphazanes with CuX (X = Br, I) salts. The reaction of cis-[(PhC≡CP)2(μ-N(t)Bu)2] (1) with CuBr in a 1:3 molar ratio gave a 3D coordination polymer, [{Cu4(μ3-Br)4}{(cis-(PhC≡CP)2(μ-N(t)Bu)2)Cu4(μ2-Br)4(cis-(PhC≡CP)2(μ-N(t)Bu)2)}4]n (3), having diamondoid topology with an unprecedented copper alkyne coordination, whereas the reaction of 1 with CuI in a 1:4 molar ratio afforded a 1D polymeric complex, [{Cu4(μ3-I)4}(NCCH3)2{cis-(PhC≡CP)2(μ-N(t)Bu)2}2]n (4). In contrast, the reaction of trans-[(PhC≡CP)2(μ-N(t)Bu)2] (2) with CuI was found to be independent of stoichiometry and afforded a 3D coordination polymer, [{Cu4(μ3-I)4}{trans-(PhC≡CP)2(μ-N(t)Bu)2}2]n (5), exclusively.
authors.affiliation: †Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
authors.forename: Mujahuddin M
authors.initials: MM
authors.lastname: Siddiqui
authors.affiliation: ‡Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States.
authors.forename: Joel T
authors.initials: JT
authors.lastname: Mague
authors.affiliation: †Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
authors.forename: Maravanji S
authors.initials: MS
authors.lastname: Balakrishna