[PtCl2(PPh3)2]-SnCl2 significantly catalyzes only the hydroformylation of -olefins at 100° in EtOH, at P(CO) = P(H2) = 65 atm; hydrocarbalkoxylation does not occur to an appreciable extent, even in the presence of potential activating agents (HCl, LiCl). The catalyst precursor was recovered from the reaction medium as the cationic complex [PtH(CO)(PPh3)2](SnCl3), with the SnCl3- anion indirectly bound to the Pt atom, and as trans-[PtCl(COR)(PPh3)2]. The latter complex is a (precursor) intermediate leading to an active catalytic species with 1 Pt-Sn bond, which plays a key role in the catalysis.
Metals in organic syntheses. X. Olefin hydroformylation and hydrocarboalkoxylation competitively catalyzed by a[PtCl2(PPh3)2]/SnCl2 system
TONIOLO, Luigi
1983-01-01
Abstract
[PtCl2(PPh3)2]-SnCl2 significantly catalyzes only the hydroformylation of -olefins at 100° in EtOH, at P(CO) = P(H2) = 65 atm; hydrocarbalkoxylation does not occur to an appreciable extent, even in the presence of potential activating agents (HCl, LiCl). The catalyst precursor was recovered from the reaction medium as the cationic complex [PtH(CO)(PPh3)2](SnCl3), with the SnCl3- anion indirectly bound to the Pt atom, and as trans-[PtCl(COR)(PPh3)2]. The latter complex is a (precursor) intermediate leading to an active catalytic species with 1 Pt-Sn bond, which plays a key role in the catalysis.
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