Hoffman, R.

Japanese: Hoffman,R.(英語表記)HoffmanR
Hoffman, R.

...Starting with the Huckel molecular orbital method, the extended Huckel method and Kenichi Fukui's (1918- ) frontier orbital theory were proposed and used. In 1965, RB Woodward (1917-79) and Roald Hoffman (1937- ) proposed the Woodward-Hoffman rule (1965), which states that whether or not a concerted thermal reaction occurs in a π electron system depends on whether or not the signs of the coefficients of the frontier orbitals match at the reaction point. This rule became an extremely powerful tool in understanding the thermal and photoreactions of unsaturated compounds, which had been difficult to understand until then. ...

From [Organic Chemistry]

...Theoretical methodologies such as the Hückel molecular orbital method were recognized as useful for understanding the physical properties and structures of organic compounds, and gradually came to be used. Kenichi Fukui's frontier orbital theory (1952), Robert Burns Woodward's (1917-79) and Roald Hoffman's (1937- ) orbital symmetry rules (1965), and others were widely used as practical theories that could be applied to organic synthesis. In the last quarter of the 20th century, organic chemistry has seen remarkable development in two fields: organic synthetic chemistry, which achieves stereocontrol of reactions, and biomimetic organic chemistry, which attempts to reproduce some of the complex functions of living organisms in the laboratory. ...

*Some of the terminology that mentions "Hoffman, R." is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヒュッケル分子軌道法に始まって,拡張ヒュッケル法や福井謙一(1918‐ )のフロンティア軌道理論が提出され利用されるようになった。1965年ウッドワードR.B.Woodward(1917‐79)とホフマンRoald Hoffman(1937‐ )はπ電子系での協奏的熱反応が起こるか否かは反応点においてフロンティア軌道の係数の符号が合致するか否かで決まるというウッドワード=ホフマン則(1965)を提出した。この法則は,それまで理解しがたかった不飽和化合物の熱反応・光反応を理解するのにきわめて強力な武器となった。…

【有機化学】より

…ヒュッケル分子軌道法に代表される理論的方法論は,有機化合物の物性や構造の理解に役立つことが認められ,しだいに利用されていった。福井謙一のフロンティア軌道理論(1952),ウッドワードRobert Burns Woodward(1917‐79)とホフマンRoald Hoffman(1937‐ )の軌道対称則(1965)などは,有機合成にも応用できる実際的な理論として大いに利用された。 20世紀の最後の四半世紀において,有機化学は反応の立体制御を実現しながら進める有機合成化学と,生体の複雑な機能の一部を実験室で再現しようという生体模倣有機化学biomimetic organic chemistryの2分野に著しい発展がみられている。…

※「Hoffman,R.」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

<<:  Hoffmann, E.

>>:  Hoffman, M.

Recommend

Making frosted skin - making frosted skin

…In that case, to remove the fishy smell from the...

bouchée (English spelling)

...Brisée dough is sticky because it contains wat...

Tenshoin Temple

She was the wife of the 13th Tokugawa Shogun, Ies...

Opium alkaloid atropine

...Side effects vary widely from person to person...

Hoi An (English spelling)

…The ancient name of Hoi An, the capital of the f...

Tver

A city on the upper Volga River in Russia. About 1...

Eunomia

…In the singular, it is called Hōra, and is the o...

Immigration Restriction Act

In the second half of the 19th century, the numbe...

Mercy - jihi

A term that is important in Buddhism. "Ji&qu...

New Japan Athletic Federation - New Japan Athletic Federation

A sports organization founded in 1965 under the ph...

Anpachi [town] - Anpachi

A town in the southwest of Gifu Prefecture, in the...

Gion Festival

This is a festival at Yasaka Shrine in Gion-cho, ...

Lockyer - Joseph Norman Lockyer

British astronomer. Discoverer of helium in the s...

Shuji Terayama

Poet, tanka writer, playwright, screenwriter, and...

Double taxation - nijuukazei (English spelling) double taxation

The imposition of two or more taxes on goods, ser...