Preparation of zerovalent phosphine substituted rhodium compounds and their use in the selective carbonylation of olefins
AssigneeExxon Research & Engineering Co.
InventorGary B. McVicker
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Abstract
A process for preparing oxygenated products comprising aldehydes, which have high normal to branched-chain isomer ratios. The process involves using particularly characterized rhodium-containing complex catalysts under a specific combination of carefully controlled reaction conditions. The product aldehydes as made above may be condensed and hydrogenated to form saturated aldehyde dimers thereof.
Claims7
A composition of matter, said composition being characterized by one of the following formulae:
- [(L)(L')Rh.degree]sub.2,[L.sub.3 Rh.degree]sub.2, [L'.sub.2 Rh.degree]sub.2 , [L"Rh.degree]sub.2
- where L is a monodentate ligand, L' is a bidentate ligand and L" is a tri or quadra-dentate ligand, wherein L, L' and L" can be the same or different and each is one selected from the group consisting of:
- 1. R.sub.3 Q, R.sub.2 R'Q, (RR'R")Q
- 2. R.sub.2 Q(CR.sub.2 ').sub.x Q'R.sub.2 ##EQU5##
- 5. RQ'[(CR.sub.2 ').sub.x QR.sub.2 ].sub.2
- 6. Q'[(CR.sub.2 ').sub.x QR.sub.2 ].sub.3
- wherein R, R' and R" can be the same or different and each is selected from the group consisting of C.sub.1 to C.sub.20 alkoxy, C.sub.3 to C.sub.8 cycloalkyl, C.sub.3 to C.sub.8 cycloalkoxy, phenyl, phenyl substituted with F, Cl, Br and I, phenyl substituted with C.sub.1 to C.sub.20 alkyl, phenyl substituted with C.sub.3 to C.sub.8 cycloalkyl, phenyl substituted with C.sub.1 to C.sub.20 alkoxy, oxyphenyl, oxyphenyl substituted with C.sub.1 to C.sub.20 alkyl, oxyphenyl substituted with C.sub.3 to C.sub.8 cycloalkyl, oxyphenyl substituted with F, Cl, Br and I, oxyphenyl substituted with C.sub.1 to C.sub.8 cycloalkoxy;
- Q and Q' can be the same or different and each is selected from the group consisting of P, As and Sb;
- and x is an integer ranging from 1 to 5.
A composition of matter according to clam 1 characterized by the following formula:
- [[(C.sub.6 H.sub.5).sub.3 Pl.sub.3 Rh.degree]sub.2.
A process for preparing a composition of matter characterized as follows:
- [(L)(L')Rh.degree]sub.2 , [L.sub.3 Rh.degree]sub.2 , [L'.sub.2 Rh.degree]sub.2 , [L"Rh.degree]sub.2
- where L is a monodentate ligand, L' is a bidentate ligand and L"is a tri or quadra-dentate ligand, wherein L, L' and L" are the same or different and each is one selected from the group consisting of:
- 1. R.sub.3 Q, R.sub.2 R'Q, (RR'R")Q
- 2. R.sub.2 Q(CR.sub.2 ').sub.x Q'R.sub.2 ##EQU6##
- 5. RQ'[(CR.sub.2 ').sub.x QR.sub.2 ].sub.2
- 6. Q'[(CR.sub.2 ').sub.x QR.sub.2 ].sub.3
- wherein R, R' and R" can be the same or different and each is selected from the group consisting of C.sub.1 to C.sub.20 alkyl, C.sub.1 to C.sub.20 alkoxy, C.sub.3 to C.sub.8 cycloalkyl, C.sub.3 to C.sub.8 cycloalkoxy, phenyl, phenyl substituted with F, Cl, Br and I, phenyl substituted with C.sub.1 to C.sub.20 alkyl, phenyl substituted with C.sub.3 to C.sub.8 cycloalkyl, phenyl substituted with C.sub.1 to C.sub.20 alkoxy, oxyphenyl, oxyphenyl substituted with C.sub.1 to C.sub.20 alkyl, oxyphenyl substituted with C.sub.3 to C.sub.8 cycloalkyl, oxyphenyl substituted with F, Cl, Br and I, oxyphenyl substituted with C.sub.1 C.sub.8 cycloalkoxy;
- Q and Q' can be the same or different and each is selected from the group consisting of P,As and Sb;
- and x is an integer ranging from 1 to 5;
- said process comprising the step of reacting a compound characterized as follows:
- L.sub.3 Rh.sup.I X, (L)(L')Rh.sup.I X, L'.sub.2 Rh.sup.I X, L"Rh.sup.I X
- wherein X is a halogen with either magnesium metal or excess magnesium amalgam in an inert atmosphere.
Dependencies are inferred from the claim text.