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首页> 外文期刊>The Journal of Chemical Physics >Photochemistry and infrared spectrum of single-bridged diborane(5) anion isolated in solid argon
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Photochemistry and infrared spectrum of single-bridged diborane(5) anion isolated in solid argon

机译:固氩中分离的单桥联乙硼烷(5)阴离子的光化学和红外光谱

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摘要

Three-center two-electron bonds are important for understanding electron-deficient molecules. To examine such a molecule, we produced a diborane(5) anion with a single-bridged structure upon electron bombardment during matrix deposition of Ar containing a small proportion of diborane(6). The diborane(5) anion was destroyed upon photolysis at 180, 220, 385, and 450 nm, but not at 532 nm. Moreover, the possible formation of neutral diborane(5) was observed upon photolysis at 385 and 450 nm, whereas neutral diborane(3) was observed upon photolysis at 180 and 220 nm. The observed line wavenumbers, relative intensities, and isotopic ratios of the diborane(5) anion agreed satisfactorily with those predicted by density functional theory calculations at the B3LYP/aug-cc-pVTZ level of theory. Thus, this method produced the boron hydride anion of interest with few other fragments, which enabled us to clearly identify the IR spectrum of the diborane(5) anion. Published by AIP Publishing.
机译:三中心两电子键对于理解缺电子分子很重要。为了检查这种分子,我们在包含少量乙硼烷(6)的Ar的基质沉积过程中,经电子轰击产生了具有单桥结构的乙硼烷(5)阴离子。乙硼烷(5)阴离子在180、220、385和450 nm处光解时被破坏,但在532 nm处不被破坏。此外,在385和450 nm处光解时观察到可能形成中性乙硼烷(5),而在180和220 nm处光解时观察到中性乙硼烷(3)。在B3LYP / aug-cc-pVTZ理论水平上,所观察到的乙硼烷(5)阴离子的线波数,相对强度和同位素比与密度泛函理论计算的结果令人满意。因此,该方法产生了所需的硼氢化物阴离子,几乎没有其他碎片,这使我们能够清楚地鉴定出乙硼烷(5)阴离子的红外光谱。由AIP Publishing发布。

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