heterocyclic ring
杂环：一种由不同元素组成的环状化合物。
常用释义
英式发音
美式发音
基本释义
- 杂环：一种由不同元素（如碳、氮、硫等）组成的环状化合物。
例句
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1·The attachment of a group to a central metallic agent such as iron with two valences to form a heterocyclic ring.一种基与中心金属离子(如二价铁离子)结合，形成杂环。
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2·Structute of nitrogen heterocyclic ring quaternary ammonium salt cationic surfactants was identi fied by mass spectrography, nuclear magnetic resonance spectra, infrared spectra and etc.用质谱法、核磁共振波谱法、红外光谱法等，确定了未知氮杂环季铵盐型阳离子表面活性剂的结构。
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3·An organic coordination (complexing) compound in which the metal ion is bound to atoms of nonmetals, e. g. nitrogen, carbon, or oxygen, to form a heterocyclic ring having coordinate covalent bonds.一种配位(络合)化合物，其中的金属离子与氮、碳或氧等非金属原子结合生成有配位共价键的杂环。
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4·Triazine is a type of heterocyclic organic compounds, it is important to ring nitrogen organic chemical raw materials.是一种三嗪类含氮杂环有机化合物，重要的氮杂环有机化工原料。
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5·It is a heterocyclic compound, containing a pyridine ring; its chemical formula is C10H14N. Nicotine is the chief addictive ingredient (see drug addiction) in cigarettes and cigars and in snuff.尼古丁为杂环化合物，含啶环，化学式为C10H14N，是纸烟、雪茄和鼻烟中的主要上瘾成分。
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6·This article reviews the ring opening reaction of five membered nitrogen containing heterocyclic compounds.综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。
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7·Purine: Any of a class of heterocyclic compounds with a two-ring structure composed of carbon and nitrogen atoms.嘌呤：嘌呤是对由碳、氮原子组成的双环结构的杂环化合物的统称。
同义词