Microwave spectrum of iodine pentafluoride

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.. ‘. -: TabIe 1 ‘. Observed and ~hxzkted tzansiticm freq‘uencies for Xks

F

27244.16. .,_“2?252.25 : 27252.33 27264.84:

2 .. 2. 0 :

“3/2)

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27kb-I.11

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27363.89

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a&ees with %e,value reported by Myers [2J.;kd is also .;” :. :. hi &@eagreementwith the rotktionaf constant c&.x- :. _ fated from ,&e ihctron *f&action &ructure for. this ~orecule f3] (BEaD, =.2729.17 MHzj_‘We note the er‘ror in g recent paper [4J where the bond Ie&hs t7t2 712.: ‘. I-F, =, 1.72 A, I-F = 1.75 A were incorrectly in-. 1712 terchanged, giving a ca *f culat~d B vaiue il;8% smaller 912 1712 : than the measured (microwave) value:.The gas’phzse 1112

..

912, 712 7/2

38175.63 :. ‘38i78.03 38178.54 38178.76 381’79.56 .’ 38180.51 38182.10“

2 0 1 1 0 3

2’ 0

912‘ : 1712 9/2 ) .. 1712) 7/2 15/z 1712 ‘, 15/z 17/2 912 1312 15/z :

38185.53 38185.74. 38188.43 38189.11 38190.37 38191.18

1 i 2 0 0

1312 7f2 912 712 3112

38191.71

1

2.

11/z

38191.97

3

15f2

1. 0

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2’ 3 3

1112 11/2 1312

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38193.03

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2

38184.18. 38183.46

38193.59. 38197.61, 38202.92 3820’2.98 38203;19 38210.29

.38216.41 38217.35 38218.86 38234.88: 38235,26 38257.40

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38173;50

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38158.85

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References

Sac, to be published. f2] R.J.Myers, unpublished. ” [3] G.G. Robiette, private cnmmunicntick [4] D-W. Osborne, F. Schreiner and ELSe&. I. Chem. Phys. 54 (f 971) 3790. [S] S. Bukshpan, C. Gotisteinand 5. Soriano, I. Chem. Phys.. 5) (19693 39?6_

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[ 11 MJ. Whittfe, RR, &adIey and P.N. &ier,Trans. Faraday

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‘,_

is very .cIose to the

One of us (R.H.B.) thanks the Science Research Council for a Research Studentship,

13J2

‘4

constant.e&

solid state value of 1073 MHz found by Miissbauer spe&troscopy [Sl. (

.

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