Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

VSEPR Theory and the Basic Shapes02:52

VSEPR Theory and the Basic Shapes

Overview of VSEPR Theory
Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Newman Projections02:06

Newman Projections

Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
Fischer Projections02:18

Fischer Projections

Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
Crystallographic Point Groups01:29

Crystallographic Point Groups

Crystallographic point groups represent the various symmetry operations that can occur within crystals. They are unique in that at least one point will always remain unchanged during these actions. For instance, consider the triclinic system. This system, devoid of any axis or plane of symmetry, aligns with the C1 and Ci point groups.where Cᵢ is characterized solely by a center of inversion.Contrastingly, the monoclinic system introduces an element of symmetry. This system with one plane and...
Quadric Surfaces01:28

Quadric Surfaces

Quadric surfaces are three-dimensional surfaces characterized by second-degree equations in the variables x, y, and z. These surfaces are smooth and continuous, and specific combinations of squared and linear terms define their shapes. The main types of quadric surfaces include ellipsoids, cones, paraboloids, and hyperboloids. Each type exhibits distinct geometric features depending on how the variables are arranged and related within the equation.Ellipsoids are closed surfaces formed when all...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Ion Recoil Energy Signatures of Geometric Shells from the Coulomb Explosion of Size-Selected Silver Clusters.

The journal of physical chemistry letters·2025
Same author

Temporal Development of a Laser-Induced Helium Nanoplasma Measured through Auger Emission and Above-Threshold Ionization.

Physical review letters·2020
Same author

Auger emission from the Coulomb explosion of helium nanoplasmas.

The Journal of chemical physics·2019
Same author

Novel antimony(iii) hydroxamic acid complexes as potential anti-leishmanial agents.

Dalton transactions (Cambridge, England : 2003)·2018
Same author

Novel class of Bi(iii) hydroxamato complexes: synthesis, urease inhibitory activity and activity against H. pylori.

Dalton transactions (Cambridge, England : 2003)·2016
Same author

Density functional theory of the CuA -like Cu2 S2 diamond core in Cu 2II(NGuaS)2 Cl2.

Journal of computational chemistry·2016

相关实验视频

Updated: Jul 19, 2026

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
12:33

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Published on: February 4, 2013

四重体化, (NPF(2)) ((4),平面或状的

A J Elias1, B Twamley, R Haist

  • 1Contribution from the Department of Chemistry, University of Idaho, Moscow, Idaho, 83844-2343, USA.

Journal of the American Chemical Society
|October 18, 2001
PubMed
概括

八个成员的异环N ((4) P ((4) F ((8) 不是平面的,与之前的发现相反. 这项研究揭示了的环状结构,特别是在-74°C的相位过渡温度以下.

更多相关视频

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization
07:28

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization

Published on: February 18, 2022

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies
08:21

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

相关实验视频

Last Updated: Jul 19, 2026

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
12:33

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Published on: February 4, 2013

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization
07:28

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization

Published on: February 18, 2022

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies
08:21

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

科学领域:

  • 无机化学 无机化学 无机化学
  • 固态化学 固态化学
  • 晶体学 晶体学是指结晶学.

背景情况:

  • 之前对N(4) P(4) F(8) 的结构确定表明它是一个平面的八个成员的异环环.
  • 了解无机环系统的精确分子几何学对于预测它们的特性和反应性至关重要.

研究的目的:

  • 使用多种实验技术重新确定N(4) P(4) F(8) 的晶体结构.
  • 澄清N(4) P(4) 环系统的结构行为,特别是关于它的平面性和相位过渡.

主要方法:

  • 单晶X射线 difraktion 的使用方法.
  • 气体电子衍射 (GED) 是一种
  • 不同扫描热量计 (DSC)
  • 计算结构的优化 (HF/6-31G,B3LYP/6-31G) 在

主要成果:

  • 八个组成的N(4) P(4) F(8) 异环绝对不是平面的.
  • 在相位过渡温度 (-74°C) 以上,环形是无序和的,看起来是伪平面的.
  • 在相位过渡下方,环采用 (K形) 形状,类似于N(4) P(4) Cl(8).
  • 低温单元是通过将c轴加倍并减少对称性,从高温阶段衍生出来的.

结论:

  • 实验和计算数据断然驳斥了之前关于平面结构N(4) P(4) F(8) 的报道.
  • 该研究详细了解了N(4) P(4) F(8) 的状,非平面结构以及其在相位过渡中的构造变化.