dimethyl
ジメチル
解説 Definition
dimethyl は、化学で二つのメチル基を含むことを表す語です。日本語の「ジメチル」と同じく、化合物名の一部として使われる専門的な表現です。
Dimethyl is a chemical name element indicating that a molecule contains two methyl groups. It commonly appears within compound names, such as dimethyl ether, and may also be used attributively when describing substances or structural features in organic chemistry.
覚え方のコツ Memory Tip
dimethyl は化学名の要素で、di-「2つ」＋ methyl「メチル基」と分ければ「メチル基が2つ」と分かります。dimethyl ether、dimethyl compound のように後ろの物質名を修飾する形が典型です。di- を dioxide「二酸化物」の di- と結び付け、methyl と ethyl の炭素数の違いにも注意しましょう。
Break dimethyl into di-, meaning “two,” and methyl, the name of the CH3 group. The structure therefore signals two methyl groups in a molecule or compound name. Connect di- with familiar scientific words such as dioxide, which also indicates two. Typical combinations include dimethyl ether, dimethyl sulfate, and dimethyl compound. Keep methyl separate from ethyl: a methyl group has one carbon atom, while an ethyl group has two. This distinction helps you read longer organic-chemistry names accurately.
例文
The lab stored dimethyl ether in a sealed container.
研究室はジメチルエーテルを密閉容器に保管しました。
Dimethyl compounds are common in organic chemistry.
ジメチル化合物は有機化学でよく見られます。
The report described the reaction of a dimethyl substance.
報告書はジメチル物質の反応について説明していました。
dimethyl の類義語・関連語
派生語
紛らわしい語
dimethyl の語源・成り立ち Etymology
ギリシャ語 di-（2つの）+ methyl（メチル基）から成る化学用語。methyl はギリシャ語 methy「酒」+ hyle「木材」に由来し、木から得られるアルコールが原義。関連語に methane（メタン）、polymer（ポリマー）がある。
Dimethyl is formed from the Greek-derived prefix di-, “two,” and methyl. The chemical term methyl was created from elements based on Greek methy, “wine,” and hyle, “wood,” reflecting the historical association of methanol with wood alcohol. In modern chemical naming, methyl denotes the CH3 group, so dimethyl indicates the presence of two such groups. It generally functions as part of a longer compound name.
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