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[Si,N,C,O]^(2+)异构体结构、相对稳定性与解离

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摘要 在UB3LYP/6-311G(d)和UCCSD(T)/6-311+G(2df)(单点)水平下得到了[Si,N,C,O]2+体系的15种异构体,对它们的结构进行了分析,并给出了能量较低的离子碎片方式.计算结果表明线型异构体SiNCO2+(2Ⅱ)是[Si,N,C,O]2+体系中热力学最稳定的物种,其次是线型的SiOCN2+(2Ⅱ),SiCNO2+(2Ⅱ)和含NCO三元环的异构体SiC(NO)(2A").几个动力学相对较稳定的异构体的稳定性顺序为SiNCO2+>SiCNO2+(2Ⅱ)>SiOCN2+>SiC(NO)2+>OSiNC2+(2Ⅱ).对异构化过程及离子碎片方式的分析结果说明线型异构体SiNCO2+是相关质谱实验中的主要物种,而且是亚稳态的,在质谱条件下可以解离成离子碎片.
出处 《中国科学(B辑)》 CAS CSCD 北大核心 2002年第6期527-533,共7页 Science in China(Series B)
基金 国家自然科学基金(批准号:20171015 20171016) 黑龙江大学杰出青年科学基金(2002年) 黑龙江省自然科学基金(批准号:E00-16)资助项目
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