Robert Parr

Robert Ghormley Parr ( born September 22, 1921 in Chicago, Illinois) is a theoretical chemist who deals with the ab initio and semiempirical calculation of molecular orbitals and properties.

Life

Robert Ghormley Parr was born the son of a university professor. He went to Washington, D.C. to school, studied at Brown University in Providence, Rhode Iceland, USA (degree: magna cum laude, 1942), and in 1947 received his doctorate at the University of Minnesota with a dissertation in the field of physical chemistry ( force constants of benzene ). From 1947 to 1948 he worked in Minnesota and moved in 1948 to the Carnegie Institute of Technology in Pittsburgh, Pennsylvania, which is now part of Carnegie - Mellon University and where he became professor in 1957. In 1962 he went to Johns Hopkins University in Baltimore, Maryland, and in 1974 to the University of North Carolina at Chapel Hill, North Carolina.

Merits

Along with Rudolph Paris he developed a method to calculate approximate molecular orbitals. This was published in 1953, and is known as the Pariser-Parr - Pople PPP or method, as John A. Pople proposed the same procedure in the same year. He is also the author of books on molecular orbital structures and theories. According to him, he has the expression " ab initio " calculation used in one of its publications first.

  • Chemists ( 20th century)
  • Theoretical chemists
  • Americans
  • Born 1921
  • Man
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