and 2-methyl-l-indanone (V) were analyzed by LAOCOON III (11). The parameters that gave the best fit are given in Table IV. ACKNOWLEDGMENTThe authors thank Sidney Siggia for his discussions and contributions during the course of this investigation and . A. Bruson of Olin Chemical Corp., New Haven, Conn., for his novel synthesis of the 1-indanones which made this study possible. The many discussions in every phase of this study with A.

a The use of infrared, nuclear magnetic resonance, and gas chromatography-mass spectrometry in the solution of a variety of structure-composition problems in petrochemical analysis is illustrated. The structures and stereochemistry