Experimental Determination and Mechanistic Implications of  the Thermochemistry of Singlet Carbenes
{'Code': '03090003', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'CHE', 'LongName': 'Division Of Chemistry'}}
{'SignBlockName': 'Seymour Lapporte', 'PO_EMAI': None, 'PO_PHON': None}
This grant in Organic and Macromolecular Chemistry provides                     support for the research work of Dr. Peter Chen, Harvard                        University. This work focuses on using laser techniques to                      determine both the strengths of chemical bonds and stabilities                  of a number of important molecules.                                                                                                                             Specifically, this work will (1) develop and exploit gas-phase                  laser spectroscopic techniques for determination of bond                        strengths, heats of formation, and excited-state energies for                   medium-to-large polyatomic molecules and reactive intermediates,                (2) determine the C=C homolytic bond dissociation energy of                     heteroatom-substituted olefins, and singlet-triplet gaps for                    the corresponding singlet ground-state nucleophilic carbenes,                   (3) test the relationship proposed by Simons and Goddard                        between the homolytic bond dissociation energy of an olefin to                  a pair of carbenes and the singlet-triplet gap in those                         carbenes by direct application of thermochemical data, and (4)                  determine key thermochemical quantities necessary to assess the                 importance of an electron-rich olefin/nucleophilic carbene                      equilibrium in reactions catalyzed by thiazolium salts.
{'FirstName': 'Peter', 'LastName': 'Chen', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Peter Chen', 'EmailAddress': None, 'NSF_ID': '000281881', 'StartDate': '03/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Harvard University', 'CityName': 'CAMBRIDGE', 'ZipCode': '021385366', 'PhoneNumber': '6174955501', 'StreetAddress': '1033 MASSACHUSETTS AVE STE 3', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Massachusetts', 'StateCode': 'MA', 'CONGRESSDISTRICT': '05', 'CONGRESS_DISTRICT_ORG': 'MA05', 'ORG_UEI_NUM': 'LN53LCFJFL45', 'ORG_LGL_BUS_NAME': 'PRESIDENT AND FELLOWS OF HARVARD COLLEGE', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1942', 'Text': 'UNIMOLECULAR PROCESSES'}
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