检索结果-南通市图书馆

Improvement of the Lewis-Abegg-octet Rule Using an “Even-Odd” Rule in Chemical Structural Formulas: Application to Hypo and Hyper-Valences of Stable Uncharged Gaseous Single-Bonded Molecules with Main Group Elements

引用

Open Journal of Physical Chemistry 2014年第2期4卷 60-66页

作者： Geoffroy Auvert CEA-Leti 17 Avenue des martyrs F38000 Grenoble France

As Lewis proposed his octet rule, itself inspired by Abegg’s rule, that a molecule is stable when all its composing atoms have eight electrons in their valence shell, it perfectly applied to the vast majority of known stable molecules. Only a few stable molecules were known that didn’t fall under this rule, such as PCl5 and SF6, and Lewis chose to leave them aside at the time of his research. With further advances in chemistry, more exceptions to this rule of eight have been found, usually with the central atom of the structure having more or less than eight electrons in its valence shell. Theories have been developed in order to modify the octet rule to suit these molecules, defining these as hyper- or hypo-valent molecules and using other configurations for the electrons. The present paper aims to propose a representation rule for gaseous single-bonded molecules that makes it possible to reconcile both;molecules following the octet theory and those which do not. In this representation rule, each element of the molecule is subscripted with two numbers that follow a set of simple criteria. The first represents the number of valence electrons of the element;while the second is calculated by adding the first number to the number of the element’s covalent bonds within the molecule. The latter is equal to eight for organic molecules following the octet rule. Molecules being exceptions to the octet rule are now encompassed by this new even-odd rule: they have a valid chemical structural formula in which the second number is even but not always equal to eight. Both rules—octet and even-odd—are discussed and compared, using several well-known gaseous molecules having one or several single-bonded elements. A future paper will discuss the application of the even-odd rule to charged molecules.

关键词： octet Rule Hypervalence Hypovalence Even-Odd Rule Electron-Pair Single Bond Molecule Chemistry

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Structural Formulas of Single-Bonded Ions Using the “Even-Odd” Rule Encompassing Lewis’s octet Rule: Application to Position of Single-Charge and Electron-Pairs in Hypo- and Hyper-Valent Ions with Main Group Elements

引用

Open Journal of Physical Chemistry 2014年第2期4卷 67-72页

作者： Geoffroy Auvert CEA-Leti Grenoble France

Lewis developed a 2D-representation of molecules, charged or uncharged, known as structural formula, and stated the criteria to draw it. At the time, the vast majority of known molecules followed the octet-rule, one of Lewis’s criteria. The same method was however rapidly applied to represent compounds that do not follow the octet-rule, i.e. compounds for which some of the composing atoms have greater or less than eight electrons in their valence shell. In a previous paper, an even-odd rule was proposed and shown to apply to both types of uncharged molecules. In the present paper, the even-odd rule is extended with the objective to encompass all single-bonded ions in one group: Lewis’s ions, hypo- and hypervalent ions. The base of the even-odd representation is compatible with Lewis’s diagram. Additionally, each atom is subscripted with an even number calculated by adding the valence number, the number of covalent bonds of the element, and its electrical charge. This paper describes how to calculate the latter number and in doing so, how charge and electron-pairs can actually be precisely localized. Using ions known to be compatible with Lewis’s rule of eight, the even-odd rule is compared with the former. The even-odd rule is then applied to ions known as hypo- or hypervalent. An interesting side effect of the presented rule is that charge and electron-pairs are unambiguously assigned to one of the atoms composing the single-charged ion. Ions that follow the octet rule and ions that do not, are thus reconciled in one group called “electron-paired ions” due to the absence of unpaired electrons. A future paper will focus on the connection between the even-odd rule and molecules or ions having multiple bonds.

关键词： Charge Molecule Ion Even-Odd Rule Structural Formula octet Rule Single Bond Covalent

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

威盛电子将科利登(Credence)的octet作为首选芯片测试平台

引用

中国集成电路 2003年第5期 9-9页

科利登系统公司最近宣布,威盛电子股份有限公司已经将科利登公司的可配置 SOC 芯片测试系统用作该公司计算机芯片组的量产测试。Octect 高效的测试时间及性能以其比竞争对手更为低廉的全面测试成本为威盛电子

关键词：芯片测试参数测量威盛电子 octet Credence 测试平台科利

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Atmel购买Credence的octet测试系统用于消费类SoC器件测试

引用

今日电子 2003年第9期 9-9页

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Credence的octet可配置SoC平台为ISE实验室设立了新标准

引用

世界产品与技术 2003年第1期 47-47页

Crednce系统公司近日宣布,其octet可配置SoC测试平台在国际半导体工程实验室ISE Labs(Internationl Semiconductor Engineering Laboratories)为器件测试的快速安装设立了一个新的标准。ISE Labs是硅谷最大的一家集成电路工程开发和生... 详细信息

Crednce系统公司近日宣布,其octet可配置SoC测试平台在国际半导体工程实验室ISE Labs(Internationl Semiconductor Engineering Laboratories)为器件测试的快速安装设立了一个新的标准。ISE Labs是硅谷最大的一家集成电路工程开发和生产测试服务的提供商,同时也是ASE测试公司的一家子公司。ISE公司将使用octet在批量生产之前测试最新的计算机、通信及消费类电子产品。

关键词：可配置 SoC octet Credence ISE 实验室

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Ikanos选用科利登octet用于宽带数字信号处理并行测试

引用

电子测试（新电子） 2004年第6期 111-111页

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：