UV Absorption Spectra of Intermediates Generated via Photolysis of B(N3)3, BCl(N3)2, and BCl2(N3) in Low-Temperature Argon Matrices†
UV Absorption Spectra of Intermediates Generated via Photolysis of B(N3)3, BCl(N3)2, and BCl2(N3) in Low-Temperature Argon Matrices†
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低温氩基质中 B(N3)3、BCl(N3)2 和 BCl2(N3) 光解生成的中间体的紫外吸收光谱†
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
J. Gilbert
中科院分区：
文献类型：
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作者：
Michael J. Travers and;J. Gilbert
用D2灯的散焦输出光光解低温氩基质，测量了分离的B（N3）3、BCl（N3）2和BCl 2N 3的紫外吸收光谱。红外光谱与紫外光谱同时进行，紫外光谱的变化与红外光谱的变化相关。在B（N3）3的光解过程中出现了一系列位于348.0、353.5、360.0、366.0、372.5和379.5 nm的谱带，并被归属为NNBN的弯曲模式的振动级数。BCl（N3）2的光解在408 nm处产生特征，其显示振动结构的证据和在275 nm处的尖锐带。408 nm的吸收被暂时指定为三元环化合物ClBN 2，275 nm的吸收带是BCl中的A1 <$<$← X1 <$跃迁。在BCl_2N_3的光解过程中没有观察到新的UV特征，尽管IR光谱清楚地表明ClBNCl的形成。这些数据表明ClBNCl在长于240 nm的波长处没有UV吸收光谱。
The UV absorption spectra of B(N3)3, BCl(N3)2 and BCl2N3 isolated in low temperature argon matrices were measured as the matrices were photolyzed with the loosely focused output of a D2 lamp. IR spectra were taken simultaneously with the UV spectra, and changes in the UV spectra were correlated with changes in the IR spectra. A series of bands at 348.0, 353.5, 360.0, 366.0, 372.5, and 379.5 nm appeared during the photolysis of B(N3)3 and were assigned as a vibrational progression in a bending mode of NNBN. Photolysis of BCl(N3)2 generated a feature at 408 nm that displayed evidence of vibrational structure and a sharp band at 275 nm. The 408 nm absorption was tentatively assigned to ClBN2, a three-membered ring compound, and the 275 nm band as the A1Π ← X1Σ transition in BCl. No new UV features were observed during the photolysis of BCl2N3, although the IR spectrum clearly indicated the formation of ClBNCl. These data indicate that ClBNCl has no UV absorption spectrum at wavelengths longer than 240 nm.