Cryochemical Studies. 3. ESR Studies of the Reaction of Group 1B Metal Atoms with Acetylene and Phenylacetylene in a Rotating Cryostat

Article abstract of DOI:10.1021/ja00342a023

The paramagnetic products of the reaction of copper, silver, and gold atoms with acetylene and phenylacetylene at 77 K in a rotating cryostat have been examined by ESR spectroscopy.Cu and C2H2 give the mono- and bis(acetylene) ? complexes, Cu(C2H2) and Cu(C2H2)2, Ag and C2H2 give the vinyl AgCH=CH, and Au and C2H2 give the vinyls AuCH=CH and CH2=CAu.All three metal atoms react withn phenylacetylene to give β-substituted α-styryls, with Cu and Ag giving one radical and Au giving two isomeric radicals.The stability of the β-substituted vinyls increases in the order AuCH=CH