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A novel hydroformylation process for the conversion of olefins having up to about 20 carbon atoms to their corresponding aldehydes is provided herein involving the use of catalysts comprising chelates in which a ligand is chelated at a metal center to produce at least one heterocyclic ring with the

A novel hydroformylation process for the conversion of olefins having up to about 20 carbon atoms to their corresponding aldehydes is provided herein involving the use of catalysts comprising chelates in which a ligand is chelated at a metal center to produce at least one heterocyclic ring with the central metal atom as part of the ring, i.e., platinum-group metal phosphinoalkylsilyl complexes with bis- or tris(phosphinoalkyl)silyl. Novel catalysts are also provided which are platinum-group metal complexes with bis- or tris(phosphinoalkyl)silyl ligands, which are synthesized by using novel bis(phosphinoalkyl)silanes or tris(phosphinoalkyl)silanes.

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A hydroformylation process for the conversion of an olefinic compound having up to 20 carbon atoms to its corresponding aldehyde which process comprises: reacting said olefinic compound in the liquid phase with carbon monoxide and hydrogen at a temperature between 60°and 200°C. and at a pressure of

A hydroformylation process for the conversion of an olefinic compound having up to 20 carbon atoms to its corresponding aldehyde which process comprises: reacting said olefinic compound in the liquid phase with carbon monoxide and hydrogen at a temperature between 60°and 200°C. and at a pressure of up to 1000 psi or more in the presence of a catalyst comprising a chelate in which a ligand is chelated at a metal center to produce at least one heterocyclic ring with the central metal atom as part of said ring, said catalyst being selected from the group consisting of (A) a platinum group metal complex of bis(phosphinoalkyl)silane having the following Formula I: [Figure] Formula I wherein: Ar is alkyl, phenyl or modified aryl, cyclohexyl or C6H4X; X is Cl, Br, F, CO2Me or CO2CF3, or SnCl3; R is Me, Et, n-Br, T-Bu or cyclohexyl or phenyl; M is an operative metal selected from the group consisting of Pt, Pd, Rh, and Ir; and ( )n is 2, 3, or 4, thereby to provide 2, 3 or 4 C atoms respectively between Si and P: (B) a platinum-group metal complex having the Formula II [Figure] Formula II wherein Ar, X, R, M and ( )n are as defined above; (C) a platinum-group metal complex having the Formula III [Figure] Formula III wherein Ar, X, R, M and ( )n are as defined above; (D) a platinum-group metal complex having the Formula IV [Figure] Formula IV wherein Ar, X, R, M and ( )n are as defined above; (E) a platinum-group metal complex of the Formula V [Figure] Formula V wherein Ar, X, R, M and ( )n are as defined above; (F) a platinum-group metal complex of the Formula VI [Figure] Formula VI wherein Ar, X, R, M and ( )n are as defined above; (G) a platinum-group metal complex of tris(phosphinoalkyl) silane having the following Formula VII [Figure] Formula VII wherein Ar, X, M and ( )n are as defined above; (H) a platinum-group metal complex having the Formula VIII [Figure] Formula VIII wherein Ar, M and ( )n are as defined above, and Y=CO, P(Ar)3, or a similar neutral ligand molecule; (I) a platinum-group metal complex of the Formula IX [Figure] Formula IX (J) a platinum-group metal complex of the Formula X [Figure] Formula X (K) a platinum-group metal complex of the Formula XI [Figure] Formula XI (L) a platinum-group metal complex of the Formula XII [Figure] Formula XII (M) a platinum-group metal complex of the Formula XIII [Figure] Formula XIII and (N) a platinum-group metal complex of the Formula XIV [Figure] Formula XIV