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dc.creatorBohn, Robert K.en_US
dc.creatorMontgomery, John A. Jr.en_US
dc.creatorMichels, H. Harveyen_US
dc.creatorByrd, Jason N.en_US
dc.date.accessioned2013-07-16T21:44:17Z
dc.date.available2013-07-16T21:44:17Z
dc.date.issued2013en_US
dc.identifier2013-WH-03en_US
dc.identifier.urihttp://hdl.handle.net/1811/55501
dc.descriptionAuthor Institution: Dept. of Chemistry, Univ. of Connecticut, Storrs, CT 06269-3060; Dept. of Physics, Univ. of Connecticut, Storrs, CT 06269-3046en_US
dc.description.abstractSecond moments, also called planar moments ($P_{ii} = \Sigma m_{i}^{} x_{i}^{2}$), are the spectroscopic parameters}~(17),~1953.}} used to determine substitution structures (r$_{s}$) ) by Kraitchman's method from spectra of a molecule and its isotopologs. They are also useful for discussing other molecular structural properties. Just as bond lengths and angles are considered transferable among similar molecules, second moments of many common groups are also transferable. This paper discusses applications of second moments of methylene/methyl groups, singly or multiply, isopropyl/tert-butyl groups, phenyl groups, per{f}{l}uoro methylene/methyl groups, combinations of any of them, and planarity of molecules, the historically most common application of second moments. The inertial defect is $\Delta = (I_{c} - I_{a} - I_{b})$ or $-2P_{cc}$. Some authors err by assuming each isotopolog provides three independent rotational constants, but in some cases they are not all independent.en_US
dc.language.isoenen_US
dc.publisherOhio State Universityen_US
dc.titleSECOND MOMENTS (PLANAR MOMENTS) AND THEIR APPLICATION IN SPECTROSCOPYen_US
dc.typeArticleen_US
dc.typeImageen_US
dc.typePresentationen_US


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