Microwave Determination of the Structure of Borine Carbonyl and of the Nuclear Moments of the Stable Boron Isotopes

Walter Gordy; Harold Ring; Anton B. Burg

doi:10.1103/PhysRev.78.512

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Microwave Determination of the Structure of Borine Carbonyl and of the Nuclear Moments of the Stable Boron Isotopes

Walter Gordy^† and Harold Ring^*,†

Anton B. Burg^‡

Department of Physics, Duke University, Durham, North Carolina

Department of Chemistry, University of Southern California, Los Angeles, California

^*Frederick Gardner Cottrell Fellow. Now with the E. I. du Pont de Nemours Company, Wilmington, Delaware.
^†The research at this University was supported by a grant-in-aid from the Research Corporation. It was submitted by H. Ring in partial fulfillment of the requirements for the Ph.D. degree.
^‡The work at this University was supported through a contract with the ONR.

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Phys. Rev. 78, 512 – Published 1 June, 1950

DOI: https://doi.org/10.1103/PhysRev.78.512

Abstract

From measurements on the $J = 1 \to 2$ and the $J = 2 \to 3$ rotational transitions of borine carbonyl its molecular structure has been determined as follows: $d_{BH} = 1.194 A$ , $d_{BC} = 1.540 A$ , $d_{CO} = 1.131 A$ , and ∠HBH = 113°52′. The moments of inertia (which assume $h = {6.624}_{2} \times 10^{- 27}$ erg. sec.) in g ${cm}^{2}$ × $10^{- 40}$ are: ${93.42}_{66}$ for $B^{10}$ $H_{3}$ $C^{12}$ O, ${96.90}_{92}$ for $B^{11}$ $H_{3}$ $C^{12}$ O, ${111.41}_{13}$ for $B^{10}$ $D_{3}$ $C^{12}$ O, and ${114.35}_{40}$ for $B^{11}$ $D_{3}$ $C^{12}$ O. Nuclear quadrupole couplings determined are 3.36±0.10 mc/sec. for $B^{10}$ and 1.55±0.08 mc/sec. for $B^{11}$ . Approximate values of the nuclear quadrupole moments are 0.06× $10^{- 24}$ ${cm}^{2}$ for $B^{10}$ and 0.03× $10^{- 24}$ ${cm}^{2}$ for $B^{11}$ . The nuclear spin of $B^{10}$ is determined as 3 and that of $B^{11}$ as 3/2.

References (21)

Gordy, Ring, and Burg, Phys. Rev. 74, 1101 (1948) ibid.75, 1325(A) (1949)
W. Gordy and M. Kessler, Phys. Rev. 71, 640 (1947)
W. Gordy, Rev. Mod. Phys. 20, 668 (1948)
R. Unterberger and W. V. Smith, Rev. Sci. Inst. 19, 580 (1948)
M. Goldhaber, Phys. Rev. 74, 1194 (1948)
S. H. Bauer, J. Am. Chem. Soc. 59, 1804 (1937)
R. H. Hughes and E. B. Wilson, Phys. Rev. 71, 562 (1947)
Strandberg, Pearsall, and Weiss, J. Chem. Phys. 17, 429 (1949)
private communication Weiss, Strandberg, Lawrance, and Loomis
Omitted endnote
C. H. Townes, Phys. Rev. 71, 909 (1947) C. H. Townes and B. P. Dailey, J. Chem. Phys. 17, 782 (1949)
H. A. Bethe and R. F. Bacher, Rev. Mod. Phys. 8, 226 (1936)
R. F. Bacher and S. Goudsmit, Atomic Energy States (McGraw-Hill Book Company, Inc., New York, 1932)
A. Nordsieck, Phys. Rev. 58, 310 (1940)
Millman, Kusch, and Rabi, Phys. Rev. 56, 165 (1939)
F. Bitter, Phys. Rev. 75, 1326(A) (1949)
J. R. Zimmerman and D. Williams, Phys. Rev. 76, 350 (1949)
R. D. Cowan, J. Chem. Phys. 17, 218 (1949)
Z. I. Slawsky and D. M. Dennison, J. Chem. Phys. 7, 509 (1939) G. Herzberg, Infrared and Raman Spectra of Polyatomic Molecules (D. Van Nostrand Company, Inc., New York, 1945), p. 224
Gordy, Simmons, and Smith, Phys. Rev. 74, 243 (1948)
L. Pauling, The Nature of the Chemical Bond (Cornell University Press, Ithaca, New York, 1939), p. 244

[c1] Gordy, Ring, and Burg, Phys. Rev. 74, 1101 (1948) ibid.75, 1325(A) (1949)

[c2] W. Gordy and M. Kessler, Phys. Rev. 71, 640 (1947)

[c3] W. Gordy, Rev. Mod. Phys. 20, 668 (1948)

[c4] R. Unterberger and W. V. Smith, Rev. Sci. Inst. 19, 580 (1948)

[c5] M. Goldhaber, Phys. Rev. 74, 1194 (1948)

[c6] S. H. Bauer, J. Am. Chem. Soc. 59, 1804 (1937)

[c7] R. H. Hughes and E. B. Wilson, Phys. Rev. 71, 562 (1947)

[c8] Strandberg, Pearsall, and Weiss, J. Chem. Phys. 17, 429 (1949)

[c9] private communication Weiss, Strandberg, Lawrance, and Loomis

[c10] Omitted endnote

[c11] C. H. Townes, Phys. Rev. 71, 909 (1947) C. H. Townes and B. P. Dailey, J. Chem. Phys. 17, 782 (1949)

[c12] H. A. Bethe and R. F. Bacher, Rev. Mod. Phys. 8, 226 (1936)

[c13] R. F. Bacher and S. Goudsmit, Atomic Energy States (McGraw-Hill Book Company, Inc., New York, 1932)

[c14] A. Nordsieck, Phys. Rev. 58, 310 (1940)

[c15] Millman, Kusch, and Rabi, Phys. Rev. 56, 165 (1939)

[c16] F. Bitter, Phys. Rev. 75, 1326(A) (1949)

[c17] J. R. Zimmerman and D. Williams, Phys. Rev. 76, 350 (1949)

[c18] R. D. Cowan, J. Chem. Phys. 17, 218 (1949)

[c19] Z. I. Slawsky and D. M. Dennison, J. Chem. Phys. 7, 509 (1939) G. Herzberg, Infrared and Raman Spectra of Polyatomic Molecules (D. Van Nostrand Company, Inc., New York, 1945), p. 224

[c20] Gordy, Simmons, and Smith, Phys. Rev. 74, 243 (1948)

[c21] L. Pauling, The Nature of the Chemical Bond (Cornell University Press, Ithaca, New York, 1939), p. 244

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Microwave Determination of the Structure of Borine Carbonyl and of the Nuclear Moments of the Stable Boron Isotopes

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