Vibrational spectra and chemical bonding in phosphazenes

Conference · Sun Jan 01 04:00:00 EST 1989

DOI:https://doi.org/10.1117/12.951581· OSTI ID:6479567

Friedrich, D. M.; Exarhos, G. J.; Samuels, W. D.; Ferris, K. F.; Hess, N. J.; Altier, D. J.; Loecker, S. P.

The polarity and polarizability /minus/P/double bond/N and P/minus/X bonds in phosphazenes (NPX/sub 2/)/sub n/ are influenced by the structure and effective electronegativities of the ligands (X) attached to the phosphorus atoms. The nature of chemical bonding in phosphazenes is revealed through responses of vibrational spectra to perturbations such as external pressure and solvent-hydrogen bonding, as well as chemical and isotopic substitution of the ligands. Raman spectra of a series of cyclic phosphazenes are used to identify and classify the vibrational modes. Changes in vibrational frequencies and Raman intensities are interpreted in terms of the polarized chemical bonding model suggested by recent calculations. 5 refs., 5 figs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6479567
• Report Number(s): PNL-SA-16105; CONF-890145-22; ON: DE89009384
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
CHEMICAL BONDS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HYDROGEN
LIGANDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
POLARIZABILITY
PRESSURE DEPENDENCE
RAMAN SPECTRA
SPECTRA
VIBRATIONAL STATES