Matrix isolation infrared and density functional theoretical studies of organic silanones, (CH3O)2SiO and (C6H5)2SiO
作者:Valery N Khabashesku、Zoya A Kerzina、Konstantin N Kudin、Oleg M Nefedov
DOI:10.1016/s0022-328x(98)00726-8
日期:1998.9
B3LYP/6-311G(d, p) calculated harmonic frequencies and infrared intensities for these molecules and for the other silanones, H2SiO (1), (CH3)2SiO (2), and CH3(CH3O)SiO (5), studied earlier by matrix isolation techniques. The observed bands at 1247 cm−1 in 3 and at 1205 cm−1 in 4 were assigned to the SiO stretching modes, which under the influence of the same substituents show the similar frequency shifts
瞬态有机silanones(CH 3 O)2 SiO(3)和(C 6 H ^ 5)2 SiO(4)由热解真空产生从3,3-二甲氧基-6-氧杂-3- silabicyclo [3.1 .0]己烷(6)及其3,3-二苯基衍生物(7),分别在12 K下被氩气低温基质捕获后,通过红外光谱直接进行了研究。通过与密度泛函理论B3LYP / 6-311G(d,p)计算得出的这些分子以及其他硅烷酮H的谐波频率和红外强度进行比较,在观察到的3和4的IR光谱中进行了振动分配。2 SiO(1),(CH 3)2 SiO(2),和CH 3(CH 3 O)SiO(5)中,由基体分离技术更早的研究。在1247厘米所观察到的条带-1在3和在1205厘米-1在4被分配到SiO拉伸模式,其中相同的取代基的影响下表现出类似的频移为ν在酮类(MO) ,次膦酸酯和亚砜。在真空热解的条件下研究发现,二苯基硅酮4比二甲氧