Cuprophilicity-Induced Cocrystallization of [Cu<sub>2</sub>(4,4‘-bpy)(CN)<sub>2</sub>]<i><sub>n</sub></i> Sheets and [Cu(SCN)]<i><sub>n</sub></i> Chains into a 3-D Pseudopolyrotaxane ZhangXian-Ming HaoZheng-Ming WuHai-Shun 2005 The cocrystallization of [Cu(SCN)]<i><sub>n</sub></i> chains and [Cu<sub>2</sub>(4,4‘-bpy)(CN)<sub>2</sub>]<i><sub>n</sub></i> (4,4‘-bpy<b> = </b>4,4‘-bipyridine) layers generated a 3-D pseudopolyrotaxane compound, [Cu<sub>2</sub>(4,4‘-bpy)(CN)<sub>2</sub>]·[Cu(SCN)] (<b>1</b>), which can also be viewed as a 3-D network constructed by linkages of 2-D sheets and 1-D chains via unsupported Cu<sup>I</sup>−Cu<sup>I</sup> interactions<b>. </b>The Cu<sup>I</sup>−Cu<sup>I</sup> contact of 2.651(4) Å in <b>1</b> is the shortest unsupported Cu<sup>I</sup>−Cu<sup>I</sup> distance documented to date, indicating cuprophilic attractions.