Series II. Correspondence, 1951-1989

This series contains the Correspondence files of the Rudolph Pariser Papers. Arranged alphabetically by subject, this series consists of eleven files in Box 2. The files’ contents consist of correspondence regarding the development and implementation of the PPP method. Of particular interest are letters between Pariser and Parr concerning their influential collaboration, and a memo summarizing the first discussion between Pariser and Parr on the issues of quantum chemistry. Numerous requests for information concerning Pariser’s theories and calculations also exist within the collection. These requests serve as a testament to the chemical community’s deep interest in the PPP method. Finally, this series also includes a subseries of letters written in the late 1980s and early 1990s regarding Pariser’s recollections on the initial development of the PPP theory. The contents of the Correspondence files are arranged into the following three sub-series: