π‐Complexes of Copper(I) with Terminal Alkynes. Synthesis and Crystal Structure of [(HC≡CCH2NH3)(Cu2Br3)] π‐Complex |
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| Authors: | G Noshtchenko V Kinzhybalo T Lis B Mykhalitchko Prof |
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| Institution: | 1. L'viv / Ukraine, Ivan Franko National University, Faculty of Chemistry;2. Wroclaw / Poland, University, Faculty of Chemistry;3. L'viv / Ukraine, Ivan Franko National University, Faculty of ChemistryDepartment of Chemistry, Ivan Franko National University, Kyryla Mefodia Str, 6, 79005 L'viv / Ukraine |
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| Abstract: | Crystals of the zwitterionic copper(I) π‐complex (HC≡CCH2NH3)Cu2Br3] have been synthesized by interaction of CuBr with HC≡CCH2NH3]Br in aqueous solution (pH < 1) and X‐ray studied. The crystals are monoclinic: space group P21/n, a = 6.722(4), b = 12.818(8), c = 9.907(3) Å, β = 100.25(4)°, V = 840.0(8) Å3, Z = 4, R = 0.0592 for 3015 reflections. The crystal structure of the π‐complex contains isolated (HC≡CCH2NH3)+(Cu2Br3)?]2 units which are incorporated into a framework by strong hydrogen N–H···Br and C≡C–H···Br bonds. The length of π‐coordinated propargylammonium C≡C bond is equal 1.216(8) Å and Cu(I)–(C≡C) distance equals 1.958(5) Å. |
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| Keywords: | Copper π ‐Complexes Propargylammonium Crystal structure |
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