Reactive Cationic Zr(IV) and Ti(IV) Complexes Containing    Labile Ligands
{'Code': '03090005', 'Directorate': {'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'LongName': 'Division Of Chemistry'}}
{'SignBlockName': 'Joseph Reed'}
Ziegler-Natta catalysts are used widely as industrial catalysts                 for the synthesis of polymers.  The zirconium and titanium                      compounds which will be studied in this project are related to                  soluble Ziegler-Natta catalysts.  This project is expected to                   provide a better understanding of how these catalysts function                  and to provide information needed to design more specific and                   more efficient catalysts for polymer synthesis.                                                                                                                 General methods for the synthesis and isolation of cationic                     organozirconium complexes of the type bis-Cp-Zr(R)(L) where L is                a labile ligand have been discovered.  The organozirconium                      complexes are highly reactive.  Their Zr-R bonds undergo rapid                  insertion of ketones, nitriles and other polar unsaturated                      substrates, and the THF complexes polymerize ethylene in the                    absence of an Al cocatalyst.  These observations support recent                 proposals that cationic Ti and  Zr complexes are active species                 in soluble Ziegler-Natta catalyst systems.  The cationic                        organozirconium complexes are also easily hydrogenated to                       synthetically useful cationic hydrides.                                                                                                                         The research plan is to synthesize an extensive series of                       Cp2M(R)(L) complexes (M = Ti, Zr) and to study the scope and                    mechanisms of their reactions with olefins and other unsaturated                substrates, and with hydrogen.  These novel compounds provide an                opportunity to study the fundamental features of insertion                      reactions of M-R bonds (M = Ti, Zr) in the absence of the many                  complications caused by Al cocatalysts.  Also included in this                  project is research to develop asymmetric organic syntheses based               on chiral cationic Cp2M(R)(L) complexes.
{'FirstName': 'Richard', 'LastName': 'Jordan', 'EmailAddress': 'rfjordan@uchicago.edu', 'StartDate': '06/01/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Washington State University', 'CityName': 'PULLMAN', 'ZipCode': '991641060', 'PhoneNumber': '5093359661', 'StreetAddress': '280 Lighty', 'CountryName': 'United States', 'StateName': 'Washington', 'StateCode': 'WA'}
{'Code': '1968', 'Text': 'PHYSICAL INORGANIC'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8706294.xml'}