Catalytic transition metal compound with alkenes, alkynes and carbon monoxide, and other unsaturated molecules which can form complexes, so that the activation of these molecules, generating new compounds. E.g. hydrogen formaldehyde reaction of olefins, the olefin with hydrogen and carbon monoxide according to the mechanism of the formation of complexes of cobalt catalyst, the resulting aldehyde (R is an alkyl group): RCH = CH2 + CO + H2─ → RCH2CH2CHO some of the metal catalyst may be an olefin into multimers. For example, titanium (Ⅲ) chloride and alkyl aluminum complex after tetrachlorethylene offer as a catalyst, can directed polymerization of olefins into polymers. 9 Bibliography edit Dai Anbang editor: "Coordination Chemistry" (Inorganic Chemistry Series), Science Press, Beijing, 1987. JCBailar, Jr., ed., The Chemistry of the Coor-dination Compounds, Van Nostrand Reinhold shelf tetrachlorethylene, New York, 1956. F.Basolo and RCJohnson, Coordination Chemis-try, The Study of Metal Complexes, Chemistry Development Benjamin, New York, 1964 In recent years, organic silicon, phosphorus, boron, arsenic, fluorine, selenium, tellurium and other rapidly tetrachlorethylene, especially silicone sealants organic silicon compound has become a multi-performance organic synthesis reagents, and widely used in many fields of food additives, medical, pharmaceutical, cosmetics, etc., in the industry for medical devices and has the special properties of rubber. Organic phosphorus compound is prepared in the presence of nature or analog nature compounds having biological activity, the development of this field and promote the study of life sciences. Xiang dry chemical (Figure) _ _ Heze use tetrachlorethylene tetrachlorethylene provided by Jinan Chemical Co., Ltd., Cheung dry. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (http://www.dilunyierchun.com) adhere to the "people-oriented" business philosophy, has a professional staff, and strive to provide the best products and services to contribute to the community and welcome new and old customers to visit us and sincere cooperation for a better future. Xiang dry chemical - your trusted friend, Company Address: Industrial Road chemical market, Contact: Mr. You can also access (www.dilunyierchun.com/supply_details_42907105.html), for more information about the company.