烯

烯 U+70EF, 烯 CJK UNIFIED IDEOGRAPH-70EF ← 烮 [U+70EE] CJK Unified Ideographs 烰 → [U+70F0]

Translingual

Han character

烯 (Kangxi radical 86, 火+7, 11 strokes, cangjie input 火大大月 (FKKB), four-corner 9482₇, composition ⿰火希)

References

• Kangxi Dictionary: page 671, character 10
• Dai Kanwa Jiten: character 19037
• Dae Jaweon: page 1080, character 7
• Hanyu Da Zidian (first edition): volume 3, page 2205, character 4
• Unihan data for U+70EF

Chinese

trad.		烯
simp. #		烯

Glyph origin

Phono-semantic compound (形聲 / 形声): semantic 火 (“fire”) + phonetic 希 (xī).

Etymology

Derived from 稀 (xī, “rare”), coined in light of the observed lack of hydrogens (as compared to alkanes) in alkenes and the fact that alkenes are flammable.

Compare 烷 (wán, “alkane”), 炔 (quē, “alkyne”).

Pronunciation

• Mandarin

  (Pinyin): xī (xi¹)

  (Zhuyin): ㄒㄧ

• Cantonese (Jyutping): hei¹

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• Mandarin
  • (Standard Chinese)⁺
    • Hanyu Pinyin: xī
    • Zhuyin: ㄒㄧ
    • Tongyong Pinyin: si
    • Wade–Giles: hsi¹
    • Yale: syī
    • Gwoyeu Romatzyh: shi
    • Palladius: си (si)
    • Sinological IPA ^(key): /ɕi⁵⁵/
• Cantonese
  • (Standard Cantonese, Guangzhou–Hong Kong)
    • Jyutping: hei¹
    • Yale: hēi
    • Cantonese Pinyin: hei¹
    • Guangdong Romanization: héi¹
    • Sinological IPA ^(key): /hei̯⁵⁵/

Definitions

烯

1. (organic chemistry) alkene

Compounds

• 丁烯 (dīngxī)
• 三氯乙烯 (sānlǜyǐxī)
• 丙烯 (bǐngxī)
• 乙烯 (yǐxī)
• 氯乙烯 (lǜyǐxī)
• 烯烴 / 烯烃 (xītīng)
• 烯胺 (xī'àn)
• 烯醇 (xīchún)
• 環戊二烯 / 环戊二烯 (huánwù'èrxī)
• 聚丙烯 (jùbǐngxī)
• 聚乙烯 (jùyǐxī)
• 聚苯乙烯 (jùběnyǐxī)
• 苯乙烯 (běnyǐxī)
• 蒎烯 (pàixī)
• 薴烯 / 苧烯 (níngxī)