Bridged transition-metal complexes and uses thereof for hydrogen

Details Bridged transition-metal complexes and uses thereof for hydrogen Bridged transition-metal complexes and uses thereof for hydrogen

1988-06-02

1990-08-28

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

556 11, 556 31, 556 32, 556 41, 556 47, 556 48, 556 58, 556142, 556144, 556145, C07F 702, C07F 1100, C07F 1502, C07F 1506

Patent

active

049527134

ABSTRACT:
The present invention constitutes a class of organometallic complexes which reversibly react with hydrogen to form dihydrides and processes by which these compounds can be utilized. The class includes bimetallic complexes in which two cyclopentadienyl rings are bridged together and also separately .pi.-bonded to two transition metal atoms. The transition metals are believed to bond with the hydrogen in forming the dihydride. Transition metals such as Fe, Mn or Co may be employed in the complexes although Cr constitutes the preferred metal. A multiple number of ancilliary ligands such as CO are bonded to the metal atoms in the complexes. Alkyl groups and the like may be substituted on the cyclopentadienyl rings. These organometallic compounds may be used in absorption/desorption systems and in facilitated transport membrane systems for storing and separating out H.sub.2 from mixed gas streams such as the produce gas from coal gasification processes.

REFERENCES:
patent: 3064024 (1962-11-01), Wilkinson
patent: 3326948 (1967-06-01), Cais et al.
Bitterwolf, Bis(cyclopentadienylthallium) Methane, etc., Journal of Organometallic Chemistry, 312 (1986), pp. 197-206.
Bryndza et al., Reaction of a Bridged Binuclear Dialkyl Cobalt Complex, etc., Journal of American Chemistry Soc., 101.16 (1979), pp. 4766-4768.
Collman et al., Principles and Applications of Organotransition Metal Chemistry, Mill Valley, CA; University Science Books, 1980.
Huheey, Inorganic Chemistry, New York; James E. Huheey, 1978.

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