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The cationic complexes of the general formula [Cu(Ar\u2010BIAN)<jats:bold>L<\/jats:bold><jats:sub>2<\/jats:sub>]BF<jats:sub>4<\/jats:sub> [<jats:bold>L<\/jats:bold><jats:sub>2<\/jats:sub> = (PPh<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub> (<jats:bold>1<\/jats:bold>), dppe (<jats:bold>2<\/jats:bold>), dppf (<jats:bold>3<\/jats:bold>), (AsPh<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub> (<jats:bold>4<\/jats:bold>); Ar = 4\u2010<jats:italic>i<\/jats:italic>PrC<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub> (<jats:bold>a<\/jats:bold>), 4\u2010MeOC<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub> (<jats:bold>b<\/jats:bold>), 4\u2010NO<jats:sub>2<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub> (<jats:bold>c<\/jats:bold>), 2\u2010<jats:italic>i<\/jats:italic>PrC<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub> (<jats:bold>d<\/jats:bold>), Ph<jats:sub>2<\/jats:sub>PCH<jats:sub>2<\/jats:sub>CH<jats:sub>2<\/jats:sub>PPh<jats:sub>2<\/jats:sub> (dppe), (Ph<jats:sub>2<\/jats:sub>PC<jats:sub>5<\/jats:sub>H<jats:sub>4<\/jats:sub>)<jats:sub>2<\/jats:sub>Fe (dppf)] were synthesised by reaction of [Cu(EPh<jats:sub>3<\/jats:sub>)<jats:sub>4<\/jats:sub>]BF<jats:sub>4<\/jats:sub> (E = P or As) and equimolar amounts of Ar\u2010BIAN ligands, or by reaction of equimolar amounts of [Cu(NCMe)<jats:sub>4<\/jats:sub>]BF<jats:sub>4<\/jats:sub>, 4\u2010<jats:italic>i<\/jats:italic>PrC<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>\u2010BIAN (<jats:bold>a<\/jats:bold>) and diphosphanes dppe or dppf, in dichloromethane, whereas the neutral complexes of the types [CuX(Ar\u2010BIAN)(EPh<jats:sub>3<\/jats:sub>)] [X = Cl, E = P (<jats:bold>5<\/jats:bold>); X = I, E = P (<jats:bold>6<\/jats:bold>); X = Cl, E = As (<jats:bold>9<\/jats:bold>)] and [{CuX(Ar\u2010BIAN)}<jats:sub>2<\/jats:sub>] [X = Cl (<jats:bold>7<\/jats:bold>), I (<jats:bold>8<\/jats:bold>); Ar = <jats:bold>a<\/jats:bold>, <jats:bold>b<\/jats:bold>, <jats:bold>c<\/jats:bold>, <jats:bold>d<\/jats:bold>, 2,4,6\u2010Me<jats:sub>3<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>2<\/jats:sub> (<jats:bold>e<\/jats:bold>), 2,6\u2010<jats:italic>i<\/jats:italic>Pr<jats:sub>2<\/jats:sub>C<jats:sub>6<\/jats:sub>H<jats:sub>3<\/jats:sub> (<jats:bold>f<\/jats:bold>)] were prepared by reaction of CuCl or CuI with equimolar amounts of Ar\u2010BIAN and EPh<jats:sub>3<\/jats:sub> (E = P, As or Sb) in acetonitrile under reflux conditions. The type of ancillary ligand EPh<jats:sub>3<\/jats:sub> and the aryl substituents on Ar\u2010BIAN play crucial roles in determining the formation of cationic or neutral copper(I) complexes. No copper(I) complexes containing coordinated SbPh<jats:sub>3<\/jats:sub> were isolated; all the corresponding attempts led to dimeric complexes <jats:bold>7<\/jats:bold> or <jats:bold>8<\/jats:bold>. Most of the complexes crystallised easily. Their study by X\u2010ray diffraction revealed distorted\u2010tetrahedral geometries around the copper(I) centres, which are quite influenced by the various aryl substituents on Ar\u2010BIAN and the ancillary ligands EPh<jats:sub>3<\/jats:sub>. All complexes <jats:bold>1<\/jats:bold>\u2013<jats:bold>9<\/jats:bold> except cationic dppf derivative <jats:bold>3a<\/jats:bold> are active catalysts for cycloaddition reactions of alkynes and azides, and also show good tolerance towards functionalised substituents of alkynes and azides. Among them, the PPh<jats:sub>3<\/jats:sub>\u2010coordinated complexes <jats:bold>1<\/jats:bold>, <jats:bold>5<\/jats:bold> and <jats:bold>6<\/jats:bold> afforded the highest catalytic activities [turnover frequency = 26.9\u201345.7 h<jats:sup>\u20131<\/jats:sup>].<\/jats:p>","DOI":"10.1002\/ejic.201201211","type":"journal-article","created":{"date-parts":[[2013,1,14]],"date-time":"2013-01-14T08:26:49Z","timestamp":1358152009000},"page":"1404-1417","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Cationic and Neutral (Ar\u2010BIAN)Copper(I) Complexes Containing Phosphane and Arsane Ancillary Ligands: Synthesis, Molecular Structure and Catalytic Behaviour in Cycloaddition Reactions of Azides and Alkynes"],"prefix":"10.1002","volume":"2013","author":[{"given":"Lidong","family":"Li","sequence":"first","affiliation":[]},{"given":"Patr\u00edcia S.","family":"Lopes","sequence":"additional","affiliation":[]},{"given":"Cl\u00e1udia A.","family":"Figueira","sequence":"additional","affiliation":[]},{"given":"Clara S. B.","family":"Gomes","sequence":"additional","affiliation":[]},{"given":"M. Teresa","family":"Duarte","sequence":"additional","affiliation":[]},{"given":"Vitor","family":"Rosa","sequence":"additional","affiliation":[]},{"given":"Christophe","family":"Fliedel","sequence":"additional","affiliation":[]},{"given":"Teresa","family":"Avil\u00e9s","sequence":"additional","affiliation":[]},{"given":"Pedro 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