找回密碼
 To register

QQ登錄

只需一步,快速開始

掃一掃,訪問微社區(qū)

打印 上一主題 下一主題

Titlebook: Van der Waals Forces and Shielding Effects; P. Diehl,E. Fluck,R. Kosfeld Conference proceedings 1975 Springer-Verlag Berlin · Heidelberg 1

[復(fù)制鏈接]
查看: 33743|回復(fù): 61
樓主
發(fā)表于 2025-3-21 16:30:51 | 只看該作者 |倒序瀏覽 |閱讀模式
書目名稱Van der Waals Forces and Shielding Effects
編輯P. Diehl,E. Fluck,R. Kosfeld
視頻videohttp://file.papertrans.cn/981/980467/980467.mp4
叢書名稱NMR Basic Principles and Progress
圖書封面Titlebook: Van der Waals Forces and Shielding Effects;  P. Diehl,E. Fluck,R. Kosfeld Conference proceedings 1975 Springer-Verlag Berlin · Heidelberg 1
描述The usefulness of solvent effect studies on NMR chemical shifts need not be elabo- rated here; many applications of solvent effects continue to be published in great profusion. Quite a few intermolecular phenomenae may contribute to solvent shifts, but there is always the ubiquitous Van der Waals effect ow. Contrary to such other effects as neighbour anisotropy 0a, reaction field contribution 0E or complexation effects 0e, no major direct use has yet been found for the Van der Waals effect. So far the role of the Van der Waals effect has been that of a nasty, disturbing phenom- enon, something to be eliminated at all costs. But it is precisely in this latter respect where almost all solvent effect studies fall short. Not only is Ow usually large (larger than 0a and 0E even in 1 H NMR and probably the dominating term with heavier nuclei), but it is strongly variable from one solute to another and even from one nu- clear site to another in the same solute molecule. No referencing technique, however cleverly devised, will be capable of eliminating the Ow contribution from the other, presumedly more interesting contributions. It appeared quite recently that mathematical trickery by the
出版日期Conference proceedings 1975
關(guān)鍵詞Chemische Verschiebung; Magnetische Kernresonanz; Molekularkraft; Shielding; molecule
版次1
doihttps://doi.org/10.1007/978-3-642-66176-1
isbn_softcover978-3-642-66178-5
isbn_ebook978-3-642-66176-1Series ISSN 0170-5989
issn_series 0170-5989
copyrightSpringer-Verlag Berlin · Heidelberg 1975
The information of publication is updating

書目名稱Van der Waals Forces and Shielding Effects影響因子(影響力)




書目名稱Van der Waals Forces and Shielding Effects影響因子(影響力)學(xué)科排名




書目名稱Van der Waals Forces and Shielding Effects網(wǎng)絡(luò)公開度




書目名稱Van der Waals Forces and Shielding Effects網(wǎng)絡(luò)公開度學(xué)科排名




書目名稱Van der Waals Forces and Shielding Effects被引頻次




書目名稱Van der Waals Forces and Shielding Effects被引頻次學(xué)科排名




書目名稱Van der Waals Forces and Shielding Effects年度引用




書目名稱Van der Waals Forces and Shielding Effects年度引用學(xué)科排名




書目名稱Van der Waals Forces and Shielding Effects讀者反饋




書目名稱Van der Waals Forces and Shielding Effects讀者反饋學(xué)科排名




單選投票, 共有 0 人參與投票
 

0票 0%

Perfect with Aesthetics

 

0票 0%

Better Implies Difficulty

 

0票 0%

Good and Satisfactory

 

0票 0%

Adverse Performance

 

0票 0%

Disdainful Garbage

您所在的用戶組沒有投票權(quán)限
沙發(fā)
發(fā)表于 2025-3-21 20:14:02 | 只看該作者
The Site Factor, between the centres of mass. In NMR, where measurements are done on nuclei (.H, .F) which are usually on the periphery of the molecules such assumption seems not too well warranted; a fact recognized, but still neglected in the early work of Bothner-By [.] and of others after him [.].
板凳
發(fā)表于 2025-3-22 00:54:53 | 只看該作者
地板
發(fā)表于 2025-3-22 05:57:05 | 只看該作者
5#
發(fā)表于 2025-3-22 11:32:19 | 只看該作者
Factor Analysis,ntribuant; σ.. At the same time it is clear that our preoccupation with σ. has as one of its goals the development of a model for σ. which allows us to . σ. with good confidence in those systems where the medium shift is composed of two or more terms. Factor analysis therefore seems to provide an alternative way of separating these effects.
6#
發(fā)表于 2025-3-22 13:38:49 | 只看該作者
7#
發(fā)表于 2025-3-22 17:44:02 | 只看該作者
,Pair Interaction Models for σw, the molar volume of the medium (tobe averaged on a mole fraction basis in case of mixtures), σ. is the 2. virial coefficient of corresponding to . collisions while σ., σ.... correspond to ternary and higher order collisions.
8#
發(fā)表于 2025-3-22 21:19:57 | 只看該作者
The Parameters ,,th . where some model for . has been inserted. With such a “simulated” field one then arrives at “simulated” . parameters. Such calculations have also been included in the present chapter. Therefore the material of this chapter will allow a comparison between the effective electric field theories and the direct interactive theories for σ..
9#
發(fā)表于 2025-3-23 02:19:45 | 只看該作者
10#
發(fā)表于 2025-3-23 07:39:40 | 只看該作者
,σw of Nuclei other than 1H and 19 F, In subsequent paper [.] several more of such data were given, but a full discussion of the .C, .Si and .H solvent effects of TMS and cyclohexane by Bacon and Maciel [.] includes all previous data. In Table 41 all the relevant data . pertaining to pure σ. effects only) is given.
 關(guān)于派博傳思  派博傳思旗下網(wǎng)站  友情鏈接
派博傳思介紹 公司地理位置 論文服務(wù)流程 影響因子官網(wǎng) 吾愛論文網(wǎng) 大講堂 北京大學(xué) Oxford Uni. Harvard Uni.
發(fā)展歷史沿革 期刊點評 投稿經(jīng)驗總結(jié) SCIENCEGARD IMPACTFACTOR 派博系數(shù) 清華大學(xué) Yale Uni. Stanford Uni.
QQ|Archiver|手機版|小黑屋| 派博傳思國際 ( 京公網(wǎng)安備110108008328) GMT+8, 2025-10-5 11:44
Copyright © 2001-2015 派博傳思   京公網(wǎng)安備110108008328 版權(quán)所有 All rights reserved
快速回復(fù) 返回頂部 返回列表
会宁县| 驻马店市| 娄烦县| 广东省| 象山县| 湖州市| 深泽县| 河东区| 江油市| 乳山市| 易门县| 淮南市| 郸城县| 得荣县| 内乡县| 寻甸| 马山县| 泗洪县| 舟曲县| 水城县| 怀远县| 西乌| 弋阳县| 洛浦县| 通许县| 秦安县| 布尔津县| 那曲县| 河西区| 莆田市| 竹溪县| 监利县| 苍山县| 东兰县| 紫阳县| 大厂| 龙井市| 岑巩县| 凤庆县| SHOW| 呼玛县|