Heterometallic Pt–Ag and Pt2Ag transition metal complexes

Synthesis of di-, tri- and tetranuclear platinum(II) and copper(I) acetylide complexes

“…In contrast, the isostructural platinum(II)-silver(I) species [{cis-[Pt] (l-r,p-C"CPh) 2 }Ag(N"CMe)]BF 4 are more reactive, i.e. they decompose on exposure to sunlight and air on formation of metallic silver [7].…”

“…This clearly shows that bipy is a better chelating ligand for copper(I) then 1a. The formation of 1a and 9 from 8 can be enhanced, when 8 is reacted with a further equivalent of bipy (7). The separation of 9 from 1a can be carried out by crystallization from dichloromethane-n-pentane mixtures at 0°C.…”

“…Complexes similar to 12 could be isolated and characterized, i.e. [{(cis-[Pt](l-r-C"CPh) 2 ) 2 }Ag]X (X = ClO 4 , BF 6 ) [1,6,7]. From platinum-silver chemistry it is known that such molecules rearrange in solution to give complexes of structural type 13 (Scheme 2) [1,6,7].…”

“…[{(cis-[Pt](l-r-C"CPh) 2 ) 2 }Ag]X (X = ClO 4 , BF 6 ) [1,6,7]. From platinum-silver chemistry it is known that such molecules rearrange in solution to give complexes of structural type 13 (Scheme 2) [1,6,7]. In 13, one of the two [cis-Pt(C"CPh) 2 Cu] units possess, as typical for 12, l,r-bridging PhC"C ligands, while the second [cis-Pt(C"CPh) 2 Cu] moiety shows a tweezer-type arrangement with l-r,p-coordinating phenylacetylides.…”

“…Trimetallic 13 isomerizes at 25°C to produce 11 (Scheme 2) [1a,1c]. The proposed mechanism and hence, the formation of 11 from 10 via intermediates 12 and 13, relates to isostructural platinum-silver complexes, which could be isolated and characterized by single X-ray structure analysis [1,6,7]. The formation of the appropriate isostructural Pt-Ag complexes can be realized by controlling the temperature and the reaction time, respectively.…”