In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1111-67-7, name is Cuprous thiocyanate, introducing its new discovery. Computed Properties of CCuNS
Treatment of an acetonitrile solution of CuI with 1,7-dithia-18-crown-6 (1,7-DT18C6) at 100C affords the coordination polymer ? 1[(CuI)2(1,7-DT18C6)2] (1) in which 1,7-DT18C6 ligands bridge (CuI)2 rings into double chains. 1D polymers of the type ?1[M{(Cu3I 4)(1,7-DT18C6)}] (M = K, 2; M = Cs, 3) can be isolated under similar conditions in the presence of respectively KI and CsI. Both contain bridging heptacyclic [Cu6I8]2- units but crystallise in different space groups, namely P1 and C2/m. The cesium cation of 3 is markedly displaced from the best plane through the thiacrown ether donor atoms. Reaction of 1,7-DT18C6 with CuSCN in the presence of NaSCN yields ?2[{Na(CH3CN)2} {(CuSCn) 2(1,7-DT18C6)}][Cu(SCN)2] (4), in which ?1[(CuSCN)2] double chains are linked through macrocycles into sheets. Infinite ? 1[{Cu(SCN)2}-] chains compensate the charge of the Na+ cations. Complex 1 can imbibe 0.90 mol CsNO3 per mol of 1,7-DT18C6 pairs.
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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”