He specialized in organic chemistry and main group element chemistry with an emphasis on physical organic chemistry .
James Cullen Martin ( January 14 , 1928 -- April 20 , 1999 ) was an American chemist .
James Cullen Martin specialized in organic chemistry and main group element chemistry with an emphasis on physical organic chemistry .
James Cullen Martin ( January 14 , 1928 -- April 20 , 1999 ) was an American chemist .