中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (r-1,t-2)-1,2-dibromo-1-bromomethylcyclohexane | —— | C7H11Br3 | 334.876 |
Bromination of methylene groups exocyclic to cyclohexyl systems can afford, besides the expected trans-dibromo products, considerable quantities of a tribromide. For example, simple bromination of 4-t-butyl-1-methylidene-cyclohexane affords c. 20% yield of (r-1, t-2, c-4)-1,2-dibromo-1-bromomethyl-4-t-butylcyclohexane.
In the last few years, photonic crystals have gained considerable interest due to their ability to “mold the flow of light.” Photonic crystals are physically based on Bragg reflections of electromagnetic waves. In simple terms, a one-dimensional (1D) photonic crystal is a periodic stack of thin dielectric films with two different refractive indices,