Mutual Placement of Isocyanide and Phosphine Ligands in Platinum(II) Complexes [PtHal 2 L 1 L 2 ] (Hal = Cl, Br, I; L 1 ,L 2 = CNCy, PPh 3 ) Leads to Highly-Efficient Photocatalysts for Hydrosilylation of Alkynes

• Published in: Molecules (Basel, Switzerland) Vol. 28; no. 23; p. 7764
• Main Authors: Kashina, Maria V, Karcheuski, Andrei A, Kinzhalov, Mikhail A, Luzyanin, Konstantin V, Katkova, Svetlana A
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 24.11.2023
• Subjects: Catalysis; catalytic activity; Chemical bonds; Electrons; hydrosilylation; isocyanide ligands; Ligands; photocatalysis; platinum(II) complexes; hydrosilylation; photocatalysis; catalytic activity; isocyanide ligands; platinum(II) complexes
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules28237764

A series of platinum complexes featuring phosphine and isocyanide ligands [PtX (PPh )(CNCy)] (X = Cl, Br, and I) as well as their parent phosphine [PtX (PPh ) ] and isocyanide [PtX (CNCy) ] analogues have been prepared and evaluated as catalysts for the photocatalytic hydrosilylation of alkynes. Under violet light irradiation (λ = 400 nm), phosphine-isocyanides complexes [PtX (PPh )(CNCy)] gave high yields of silylated products (product yield up to 99%, TONs up to 1.98 × 10 ). The blue light irradiation (λ = 450 nm) was more suitable for the parent phosphine complexes [PtX (PPh ) ], which showed comparable efficiency (product yield up to 99%, TON up to 1.98 × 10 ), while isocyanide complexes [PtX (CNCy) ] were not active.