organic compounds 有机化合物compounds of carbon 碳化合物hydrocarbons and their derivatives 碳氢化合物及其衍生物organic chemistry 有机化学structure of molecule 分子结构chemicalbond 化学键covalent bond 共价键hybrid orbital 杂化轨道bond length 键长bond angle 键角bond energy键能polarity 极性dissociation energy 离解能constitution构造contiguration构型conformation构象stereochemistry立体化学tetrahedral正四面体cis-顺trans-反isomerism同分异构现象isomer异构体stereoisomer立体异构constitutional isomer构造异构structural formula 结构式octet八
