Abstract
Reaction of Ph3SnCl and K-3[Cu(CN)(4)] with quinoxaline (qox) at room temperature affords the novel 3D-supramolecular coordination polymer (SCP) (a) (3) [Cu-2(CN)(4)center dot(Ph3Sn)(2)center dot qox], I, as the first example of the organotin-CuCN SCP containing the Ph3Sn fragment. The structure of I displays two Cu(CN)(2) building blocks connected by a Ph3Sn cation and qox ligand creating the rhombic [Cu-2(mu-CN)(2)] motif. The structure of I contains three different fused rings, the minicycle [Cu-2(mu-CN)(2)], the 18-atomic [Cu-4(Ph3Sn)(2)(CN)(4)(qox)(2)], and the 24-atomic [C8N8Cu4(Ph3Sn)(4)] rings, which create a non-interpenetrating 3D-network. These rings form a box-like structure with cavities suitable to accommodate bulky phenyl groups. SCP I belongs to the rapidly growing family of supramolecular assemblies containing the quite unusual [Cu-2(mu-CN)(2)] motif, the repeated appearance of which raises the question whether cuprophilic interactions therein are the basic cause of the existence of I.