Title

Generation and ESR investigation of YF2 and Y(CN)2 radicals in rare gas matrices

ACS Citation

Knight, L. B.; Wise, M. B. Generation and ESR investigation of YF2 and Y(CN)2 radicals in rare gas matrices. J. Chem. Phys. 1980, 73, 4946-4946.

Abstract

The YF2 and Y(CN)2 radicals have been generated and trapped in argon and krypton matrices at 12 K and studied via ESRspectroscopy. Codeposition reactions between Y and X2 were found to produce Y(CN)2 but not YF2 which was generated by the high temperature vaporization reduction of YF3. Comparisons of matrix codeposition results with gas phase reactions monitored by electronic chemiluminescence are discussed. The magnetic parameters for YF2 in argon are: g 1=1.997(1), g 2=1.989(1), and g 3=1.985(1): 19F; A 1=98(2), A 2=89(2), and A 3=75(2) MHz: 89Y; A 1=758(3), A 2=757(3), and A 3=728(3) MHz. The parameters for Y(CN)2 are: g=1.973(2) and A(89Y)=672(3). The existence of low lying excited states and correlations with the Y++ ion are discussed as reasons why the electronic structure of YF2 differs substantially from that of ScF2. The electronic differences are consistent with recent entropy measurements for these two radicals.

Source Name

Journal of Chemical Physics

Publication Date

1-1-1980

Volume

73

Issue

10

Page(s)

8107-8116

Document Type

Citation

Citation Type

Article