868613-31-4Relevant academic research and scientific papers
Selectivity in the self-assembly of organometallic gold(I) rings and [2]catenanes
Habermehl, Nicolle C.,Jennings, Michael C.,McArdle, Christopher P.,Mohr, Fabian,Puddephatt, Richard J.
, p. 5004 - 5014 (2008/10/09)
The selectivity of formation of organometallic rings or [2]catenanes [{X(4-C6H4OCH2-C≡CAu)2(μ- Ph2PZPPh2)}n], n =1 or 2, respectively, has been studied as a function of the hinge group X and the diphosphine ligand [X = O, S, SO2, CH2, CMe2, CPh2, C(CF3)2, C6H10; Z = (CH 2)m with m = 2-5]. When Z = (CH2)3, mixing of pairs of compounds with different C2v-symmetrical hinge groups (X, X′ = SO2, CH2, CMe2, CPh 2, C(CF3)2, C6H10) led to formation of an equilibrium mixture containing the unsymmetrical [2]catenanes [{X(4-C6H4OCH2-C≡CAu)2(μ- Ph2PZPPh2)}{X′(4-C6H4OCH 2C=CAu)2(μ-Ph2PZPPh2)], as identified by NMR spectroscopy. The complexes with Z = (CH2) 4 exist in solution predominantly as the macrocycles and so do not form analogous mixed diacetylide complexes. When the hinge group contained a prochiral carbon center (X = CHMe, CMePh, 1,1-indanylidene), only achiral macrocycles [X(4-C6H4OCH2C≡CAu) 2(μ-Ph2PZPPh2)] were formed in solution when Z = (CH2)4, but mixtures containing both achiral macrocycles and chiral [2]catenane were formed when Z = (CH2) 3. In several cases, the solid-state structures of the isolated complexes were not representative of the structures in solution, with macrocycles being dominant in solution and [2]catenanes formed preferentially during crystallization.
