线性HC $_5$ H和累积多烯卡宾H $_2$ C $_5$的电子光谱
Electronic spectra of linear HC$_5$H and cumulene carbene H$_2$C$_5$
摘要：
在氖基体和气相中观察到线性HC $_5$ H（A）的$1 ^3Σ_u^- \leftarrow X^3Σ_g^-$跃迁。分配是基于质量选择性实验，外推较长的HC $_{2n+1}$ H同系物，和密度泛函和多状态CASPT 2理论方法以前的结果。另一个在氖中起始于303 nm的带系被指定为枯烯卡宾五亚四烯基H $_2$ C $_5$（B）的$1 ^1 A_1 \leftarrow X ^1 A_1$跃迁。
英文摘要：
The $1 ^3Σ_u^- \leftarrow X^3Σ_g^-$ transition of linear HC$_5$H (A) has been observed in a neon matrix and gas phase. The assignment is based on mass-selective experiments, extrapolation of previous results of the longer HC$_{2n+1}$H homologues, and density functional and multi-state CASPT2 theoretical methods. Another band system starting at 303 nm in neon is assigned as the $1 ^1 A_1 \leftarrow X ^1 A_1$ transition of the cumulene carbene pentatetraenylidene H$_2$C$_5$ (B).
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