环状化合物的立体化学在有机化学中起着十分重要的作用。
The important role of stereochemistry of cyclic systems in organic Chemistry has been well established.
而羧基邻位有酚羟基存在时，则配体以双齿形式与钛配位形成二茂钛六元环状化合物。
And if there is a hydroxyl in ortho position of carboxyl, the oxygen of hydroxyl and carboxyl in ligand are bound to ti to form hexatomic cyclic compound.
芳烃是环状碳氢化合物，如苯，甲苯和二甲苯。
The aromatics are ringed hydrocarbons, such as benzene, toluene and xylene. Benzene is used to make polystyrenes e.g.
为环状构造的化合物，环中一个或多个碳原子被另一元素的一个原子（诸如氮、硫、或氧）所取代。
Ring compounds in which one or more of the carbon atoms in the ring are replaced by an atom of another element such as nitrogen, sulfur or oxygen.
近期进展是利用手性辅助试剂，不对称合成链状和环状的1，4-二羰基化合物。
Recent developments making use of chiral auxiliaries have put forward the versatility of procedure for the asymmetric synthesis of linear and cyclic 1,4-dicarbonyl compounds.
化合物6是一维的双螺旋结构，由20元环状结构单元组成。
Compound 6 is a 1d double helical chain containing 20-membered rings (6).
天然环状四吡咯化合物包括卟啉、卟吩、细菌卟吩、异菌卟吩以及可啉等类物质，其合成研究是目前有机合成领域的热点之一。
The synthesis of natural cyclic tetrapyrroles which include porphyrins, chlorins, bacteriochlorins, isobacteriochlorins and corrins is presently one of the most attractive fields in organic synthesis.
油烟烟气中直链的羰基化合物的浓度大于支链及环状的羰基化合物的浓度；
The straight-chain compounds were relatively more abundant than the aromatic aldehydes and the branch-chain aldehydes in the oil smoke.
应用密度泛函理论对10种环状氮氢化合物异构体进行了研究。
Density function B3LYP method was applied to study 10 cyclic hydronitrogen compounds.
该树脂掺合物包括：环氧化合物、具有环状结构的化合物，及交联剂。
The resin blend includes an epoxy compound, a compound having a ring structure, and a crosslinking agent.
具有带酯键的侧链的五元环或六元环的环状醚化合物，其中所述环状醚化合物的含量，按每100质量份所述酯化合物，调整到0.01至5质量份。
The content of the cyclic ether compound is adjusted to 0.01 to 5 parts by mass based on 100 parts by mass of the ester compound.
具有带酯键的侧链的五元环或六元环的环状醚化合物，其中所述环状醚化合物的含量，按每100质量份所述酯化合物，调整到0.01至5质量份。
The content of the cyclic ether compound is adjusted to 0.01 to 5 parts by mass based on 100 parts by mass of the ester compound.
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