| |
| Author(s) |
Vivekananda, K. V.; Dey, S.; Maity, D. K.; Bhuvanesh, N.; Jain, V. K.
(ChD)
|
| Source |
Inorganic Chemistry, 2015. Vol. 54 (21): pp. 10153-10162 |
| ABSTRACT
|
Addition of 1,4-benezenedithiol and 4,4′-biphe-nyldithiol to M(OTf)2(M =cis-[Pt(PEt3)2]2+ or cis-[Pd-(dppe)]2+) (dppe = 1,2-bis(diphenylphosphino)ethane) gave self-assembled tetranuclear complexes [M2{S(C6H4)nS}]2-(OTf)4(n= 1, 2). The same reaction with 1,4-benezenedime-thanethiol yielded octanuclear supramolecular coordination complexes (SCC) [M2{SCH2C6H4CH2S}]4(OTf)8. These complexes were characterized by NMR, mass, and UV−vis spectroscopies, cyclic voltammetry, as well as density functional theory studies and represent the first examples of SCCs constructed by thiolate groups and square-planar metal ions. The rectangular shape of tetranuclear complexes and square shape of octanuclear complex are confirmed by single-crystal structures and computational studies. The palladium complexes showed excellent catalytic activity in Suzuki C−C cross-coupling reactions with high turnover numbers (2×107), even with low catalyst loading. |
|
|
|