Photodissociation of C3H5Br and C4H7Br at 234 nm

Bulletin of the Korean chemical society

Kyoung-Seok Lee¹  Kiryong Hong¹  Dababrata Paul¹  Hyun Kook Kim¹  Hana Cho¹  Tae Kyu Kim¹ 

关键词: Photodissociation;    Cycloalkyl Halides;    Curve-crossing;    Cs symmetry;    Ion-imaging;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The photodissociation dynamics of cyclopropyl bromide (C3H5Br) and cyclobutyl bromide (C4H7Br) at 234 nm was investigated. A two-dimensional photofragment ion-imaging technique coupled with a [2+1] resonanceenhanced multiphoton ionization scheme was utilized to obtain speed and angular distributions of the nascent Br(2P3/2) and Br*(2P1/2) atoms. The recoil anisotropies for the Br and Br* channels were measured to be βBr = 0.92 ± 0.03 and βBr* = 1.52 ± 0.04 for C3H5Br and βBr = 1.10 ± 0.03 and βBr* = 1.49 ± 0.05 for C4H7Br. The relative quantum yield for Br was found to be ΦBr = 0.13 ± 0.03 and for C3H5Br and C4H7Br, respectively. The soft radical limit of the impulsive model adequately modeled the related energy partitioning. The nonadiabatic transition probability from the 3A` and 4A` potential energy surfaces was estimated and discussed.

【 授权许可】

Unknown