检索结果-南通市图书馆

Chiral and Achiral Bis(2-oxazolinylphenolato)nickel(Ⅱ) complexes—Synthesis, Crystal Structure, and Catalytic Properties

引用

Chinese Journal of Chemistry 2004年第7期22卷 732-737页

作者：赵蔚钱延龙黄吉玲 Laboratory of Organometallic Chemistry East China University of Science and Technology Shanghai 200237 China

A series of chiral and achiral bis(2-oxazolinylphenolato)nickel(II) complexes 2 were synthesized by reactions of various 2-(4,5-dihydro-2-oxazolyl)phenol derivatives with nickel chloride hexahydrate. The molecular structure of complex 2a was determined by X-ray single crystal diffraction. The crystal of complex 2a was monoclinic, space group P21 with cell dimension of a=1.1121(4) nm, b=0.9472(3) nm, c=1.4113(5) nm, ==90, =91.450(6), V=1.4861(8) nm3, Z=2, and =0.693 mm—1. In the solid state, the nickel(II) ion was in a square-planar coordination geometry. The catalytic activities of complexes 2 in Baeyer-Villiger reaction with molecular oxygen were investigated.

关键词： nickel complexes oxazoline crystal structure Baeyer-Villiger oxidation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

nickel complexes Bearing Bidentate SchifF Base as Ethylene Oligomerization Catalysts

引用

Journal of Natural Gas Chemistry 2003年第2期12卷 98-104页

作者： Jianjun Yi, Xugeng Huang, Wei Zhang, Xiaoyu Hong, Zhenhua JingResearch Institute of Petroleum Processing, Beijing 914-24, Beijing 100083, China Res. Inst. of Petroleum Processing Beijing 914-24 Beijing 100083 China

Several nickel complexes [N,N]NiBr_2, in which [N,N] indicates bidentatenitrogen-containing ligands (1: [N,N]=N-(2,6-diisopropylphenyl)pyridine-2-carboxaldimine(C_(18)H_(22)N_2); 2: N-(2,6-diisopropylphenyl)-6-methylpyridine-2-carboxaldimine (C_(19)H_(24)N_2);3: N-(2,4,6-trimethylphenyl)pyridine-2-carboxaldimine(C_(15)H_(16)N_2); 4:N-(2,4,6-trimethylphenyl)-6-methylpyridine-2-carboxaldimine (C_(16)H_(18)-N_2) were synthesized.Some of the nickel complexes exhibit high activity for ethylene oligomerizatiori in the presence ofan organoaluminum activator. The main factor affecting the activity and the structure of oligomersis the steric effect of substituents on [N,N] ligands. Methylaluminoxane (MAO) -activated catalystsshowed higher activities and produced oligomers with higher molecular weight than Et_2AlCl-activatedones. The oligomerization in toluene rather than hexane results in much higher activity, and theoligomers produced in toluene have relatively high molecular weight. With activation of MAO orEt_2AlCl, the [N,N]NiBr_2 system tended to produce highly branched oligomers with low α-olefincontent, but the α-olefin content could be increased by changing the reaction conditions.

关键词： nickel complexes schiff base ethylene oligomerization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Syntheses, Characterization and Crystal Structures of New nickel complexes with 2,6-Bis(imino)pyridyl Ligands

引用

Chemical Research in Chinese Universities 2005年第4期21卷 496-500页

作者： FANRui-qing ZHUDong-sheng MUYing LIGuang-hua SUQing NIJian-guo FENGShou-hua KeyLaboratoryforSupramolecularStructureandMaterialsofMinistryofEducation SchoolofChemistry StateKeyLaboratoryofInorganicSynthesisandPreparativeChemistrySchoolofChemistry JilinUniversityChangchun130012P.R.ofChina

In the past decade, the imino-complexes based on late transition metal have received significantly increasing attention for their excellent performance in the olefin polymerization area since Brookhart et al.[1-8].

关键词： Bis(imino)pyridyl ligand nickel complexes Crystal structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and Structure of nickel complexes Based on Benzimidazole and Pyrophosphate Ligands

Synthesis and Structure of Nickel Complexes Based on Benzimi...

引用

中国化学会第十届全国无机化学学术会议

作者： Xin-Lun Li Jin-Feng Gu Shuo Li Feng-Mei Nie Department of Chemistry Capital Normal University

Pyrophosphate (ppi) is a reactant or product involved in some important metabolic processes such as fat metabolism,protein synthesis,hydrolysis and synthesis of ATP and DNA

关键词： nickel complexes pyrophosphate dihydrogen pyrophosphate

来源： cnki会议评论

在线全文

cnki会议

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

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

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：