隠れ家

​​​​​​​​​ <figure - flowchart for determining the point group of a molecule >
The successive application (or composition作文、作曲、組成、文字組版、組み立て、配合、合成、複合、和解、示談、気質、構成{にんげんよりは、A.I.のホウガ？ましカモ ??? } ) of one or more symmetry operations of a molecule has an effect equivalent to that of some single symmetry operation of the molecule. For example, a C2 rotation followed by a σv reflection is seen to be a σv' symmetry operation: σv*C2 = σv'. ("Operation A followed by B to form C " is written BA = C ). Moreover, the set of all symmetry operations (including this composition operation) obeys all the properties of a group, given above. So (S,*) is a group, where S is the set of all symmetry operations of some molecule, and * denotes the composition (repeated application ) of symmetry operations.
This group is called the point group of that molecule, because the set of symmetry operations leave at least one point fixed (though for some symmetries an entire axis or an entire plane remains fixed ). In other words, a point group is a group that summarizes all symmetry operations that all molecules in that category have. The symmetry of a crystal, by contrast, is described by a space group of symmetry operations, which includes translations in space.
One can determine the symmetry operations of the point group for a particular molecule by considering the geometrical symmetry of its molecular model. However, when one USES a point group to classify molecular states, the operations in it are not to be interpreted in the same way. Instead the operations are interpreted as rotating and/or reflecting the vibronic電子振動の結合した[バイブロニック ]?! (vibration振動(このバアイは対称性はむずかしい?? )-electronic ) coordinates and these operations commute with the vibronic Hamiltonian. They are "symmetry operations " for that vibronic Hamiltonian. The point group is used to classify by symmetry the vibronic eigenstates固有状態??. The symmetry classification of the rotational levels, the eigenstates of the full (rotation-vibration-electronic ) Hamiltonian, requires the use of the appropriate permutation-inversion group as introduced by Longuet-Higgins<~ Longuet-Higgins was born on 11 April 1923 at The Vicarage, Lenham<ケント州は、きほんてきに・農村地帯・・のどかな、酪農ふうけい{いちじ？, 狂牛病がはやり・たいへんだった・ガ？?・,・,, }が・ヒロガル(人口 3,300人ていど ?? ) !?? ~ The Tithe Barn in Lenham, Kent, England is a large medieval tithe barn to the south of St Mary's Church. It was probably built in the late 14th century and is a Grade I listed building.
The timber framed structure has internal aisles on both sides and both ends and sits on a timber sill supported on a stone plinth or on stone pedestals. It is nine bays区画?? long, two of which were added in the late 15th century or early 16th century and is weatherboarded with a tiledスレートのこと?? hip roof寄棟造(このかたちが、イチバン・つようと・いわれて・イル(横幅もヒロク、とれる !? ) ??? ). The main part of the roof is supported on crown post<~ A crown post is a term in traditional timber framing for a post in roof framing which stands on a tie beam or collar「えり」のように見える屋根?!?  beam「梁はり 」{rafter垂木をつかう < https://en.wikipedia.org/wiki/Rafter > ?!? } and supports a collar plate. Historically, crown posts were called king posts, but this usage is confusing and obsolete. A crown post is designed to be in a compression and transfers weight to the tie beam, where a *king posts is designed to be in tension and supports the tie beam. In the U.K a crown strut支柱(突っ張り、控え、方杖[肩で風を切って歩く??? ] ) is similar to a crown post but does not carry a plate. 雨が多いようでは・ここは？・もうダメ !?, ほかの場所を探した方がマシ[→, ​agriculture​!? ] ???  </wiki/Crown_post > > trusses with the aisle roofs< https://www.google.com/search?q=aisle+roof&client=firefox-b-d&tbm=isch&source=iu&ictx=1&fir=J2wjdpZxse4ihM%252CojGBLHX1SqIdSM%252C_&vet=1&usg=AI4_-kQmpsS_yOywNCNzmdmQ-Uv1ci1qNQ&sa=X&ved=2ahUKEwiOtrWIucfuAhWac3AKHSuwAnoQ9QF6BAgJEAE#imgrc=J2wjdpZxse4ihM > formed by raking rafters between the wall stud飾り釘(間柱を打ち付ける、止め金具?! )s and the main trussさんかく??? postこれは建物をいみするモノ??s.< http://kentiku-kouzou.jp/kouzoukeisan-kingposttorasu.html >キングポストトラスとは？1分でわかる意味、計算、応力、特徴、部材の名称 ?!? < https://ja.wikipedia.org/wiki/%E3%83%88%E3%83%A9%E3%82%B9%E6%A9%8B >/wiki/トラス橋
The barn belonged to St Augustine's, Canterbury, and was originally one of a pair, but the other burnt downしょうしつする !?!  in 1962. </wiki/Tithe10分の1、10分の1税(こんな?,税のかたちは・伝統的なもの ??? )_Barnバーン、納屋、物置、倉庫、がらんとした建物,_Lenham > >, Kent, England, the elder son and second of the three children of Henry Hugh Longuet Longuet-Higgins (1886-1966), vicar of Lenham, and his wife, Albinia Cecil Bazeley. He was educated at The Pilgrims' School, Winchester, and Winchester College. At Winchester College he was one of the "gang of four " consisting of himself, his brother Michael, Freeman Dyson and James Lighthill. In 1941, he won a scholarship to Balliol College, Oxford. He read chemistry, but also took Part I of a degree in Music. He was a Balliol organ scholar. As an undergraduate he proposed the correct structure of the chemical compound diboraneジボラン< https://ja.wikipedia.org/wiki/%E3%82%B8%E3%83%9C%E3%83%A9%E3%83%B3 >[~ ジボランは半導体材料ガスとして重要である。重合触媒や還元剤、ロケットの推進剤としても役立つ。ただし、引火性が高く、爆発性で、さらに毒性が高い.
ジボランを用いると、半導体表面にホウ素をドープ（添加 ）できる. シリコン膜上にホウ素をドープすると、電子の不足した領域、すなわちp型のシリコン膜を形成できる. なお、n型のシリコン膜を形成するには電子が過剰なヒ素をドープすればよいため、アルシンを用いる. 単なるシリコン薄膜形成にはシラン（モノシラン）やジクロロシランが適する.
ジボランをドープするには化学気相成長 (CVD) 装置などの真空チャンバーを用いる. 水素をキャリア（薄めるガス ）としたジボランを通じ、放電を起こすことでドープできる. また、他のボラン類の合成材料ともなる. <ジボランの用途ーー/wiki/ジボラン > ] (B2H6)[< https://plaza.rakuten.co.jp/tadashityutyu/diary/201804140000/ >2018年04月14日discovery(History)---darmstadtium[110Ds ]ダームスタチウム　←high-temperature superconductivity高温超伝導(boron《元素》ホウ素、ボロン●【略】B●原子番号5.  原子量10.811（天然同位体存在比 B-10：19.92％、B-11：80.12％）.  融点2079℃. 沸点2550℃. 密度2.53g/cm^3. 比較的に安定. 無定形は褐色粉末（花火で青色を発する）、金属硼素は黒色で極めて硬い（モース硬度9.3）. 半導体、宇宙機器用のフィラメント、耐熱ガラス、ほーろうの原料. ボラン（硼素の水素化合物）は化学分野で炭素に継いで広範囲にわたる. ) ], the structure of which was then unknown because it turned out to be different from structures in contemporary chemical valence theory. This was published with his tutor, R. P. Bell. He completed a Doctor of Philosophy degree in 1947 at the University of Oxford under the supervision of Charles Coulson. <education and early life---/wiki/Christopher_Longuet-Higgins > >.
by Wikipedia
分子に存在する対称性およびその対称性に応じた分子の分類を述べる. 分子対称性は化学における基本概念であり、双極子モーメントや許容分光遷移（ラポルテの規則といった選択則に基づく ）といった分子の化学的性質の多くを予測あるいは説明することができる(しかし？、せつめいできたとしても？？・抽象的では、やくに・たたない・ので？・computerｓのソンザイが≪重要, ≫と・なって・こざる・おえない・じょうきょうが・現在にイタッテいるの、カモ ??,??? ).


https://www.chem-station.com/blog/2021/01/chemmath4.html
分子の対称性が高いとはどういうことですか？
=?! たくさんの種類の対称操作を実行できること・・・


<figure >
アンモニアの水素に番号を付けていたとしても、反時計回り 120 度回転と時計回り 240 度回転の結果を区別することはできません. ,,,
{ここの項目は？、これを・みたほうが・テットリバヤイ、と？いえるような・もの(しかしながら'computer's programmings "を前提としており、もう？,にんげんでは・計算できないトイッタないよう？？ ) !?!・・・ }
https://www.amazon.co.jp/%E5%88%86%E5%AD%90%E3%81%AE%E5%AF%BE%E7%A7%B0%E3%81%A8%E7%BE%A4%E8%AB%96-%E4%B8%AD%E5%B4%8E-%E6%98%8C%E9%9B%84/dp/4807900862
分子の対称と群論 (Japanese) Tankobon Hardcover ? February 15, 1973
by 中崎 昌雄 (著){英語がとくいな翻訳化みたい(ダカラ「分子対称性 」の第一人者< https://chukyo-u.repo.nii.ac.jp/index.php?page_id=13&block_id=21&action=repository_view_main_item_snippet&pn=1&count=20&order=8&lang=japanese&creator=%E4%B8%AD%E5%B4%8E%20%E6%98%8C%E9%9B%84 >？？ )カモ ??? }
分子軌道法をはじめ、分子スペクトル、結晶場理論の説明を群論を用いて説明してあります. 導入として行列やベクトル、量子力学の説明を行ってあり、化学屋さんには持って来いだと思います. 著者の中崎先生は群論が専門ではないらしいので、先生なりに勉強をしながら書かれたというのも、この本の解り易さに繋がっているのではないでしょうか. いずれにせよ、お気に入りの一冊です. (初学者向けの一冊2004 review this product )​​​​​​​​​