Vibrational Intensities in Halogenated Methanes. II. Methylene Bromide and Methylene Iodide

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Abstract
The absolute intensities of the fundamental bands in CH2Br2 and CH2I2 of species B1 and B2 have been measured. The intensities observed are, in cycles/sec at NTP, CH2Br2        CH2I2A614.6×101037.2×1010A748.2×101077.9×1010A81003 ×1010473 ×1010A9616 ×10101109 ×1010 The bond moments and bond derivatives calculated from this data are CH2Br2        CH2I2μCH+0.55×10−18+0.5 ×10−18 (B1 vibrations)+0.86×10−18 (B2 vibrations)μCI−0.70×10−18 0 (assumed)∂μCH/∂rCH+0.17×10−10 or −0.10×10−10+0.2 ×10−10 or −0.2×10−10∂μCX/∂rCX+3.27×10−10+2.1 ×10−10 where the ambiguity in signs that led to alternate values of ∂μCH/∂rCH could not be resolved.
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