methanes (NCOC6H4)2CH2 and (NCOC6H4)2CH2 derivative 1 was modified by adding a methyl group to the annulated benzene perimeters to enhance the steric protection of a potentially coordinated main groupmetal cation. On reaction of 1 with group13 trimethyl reagents and dialkyl aluminium halides the ligand backbone gets deprotonated and the two endocyclic nitrogen donor atoms coordinate with the remaining
为了关注可用于催化转化的低价主族金属络合物的高度重要性,本文研究了有前途的新配体体系(4-MeNCOC 6 H 3)2 CH 2(1)。它在众所周知的萘乙酸配体上图案化,并进一步发展为母体双杂环化合物。与先前基于双环杂环甲烷(NCOC 6 H 4)2 CH 2和(NCOC 6 H 4)2 CH 2衍生物1的研究结果进行比较通过在环苯的周长上添加甲基来修饰MgO2,以增强潜在配位的主族金属阳离子的空间保护作用。在1与13组三甲基试剂和卤代二烷基铝反应时,配体主链被去质子化,两个环内氮供体原子与剩余的有机金属片段配位,形成六元金属杂环。[Me 2 Al (4-MeNCOC 6 H 3)2 CH}](2),[Me 2 Ga (4-MeNCOC 6 H 3)2 CH}](3),[Me 2 In (4-MeNCOC 6H 3)2 CH}](4),[ClMeAl (4-MeNCOC 6 H 3)2
Ultrasonic irradiation in the synthesis of trimethylaluminum from methyl iodide via methylaluminum sesquiiodide
作者:Paw-Hwa Yang、Kou-Fu Liou、Yih-Tsung Lin
DOI:10.1016/s0022-328x(00)98951-4
日期:1986.7
Methyliodide and aluminum powder were irradiated with ultrasound to form methylaluminum sesquiiodide, which was then treated with triethylaluminum to give trimethyaluminum in satisfactory yield (86%) and purity (95%).
Ring-opened copolymers of dihydrodiclopentadiene, norbornene or
申请人:The B. F. Goodrich Company
公开号:US04136249A1
公开(公告)日:1979-01-23
1,2-Dihydrodicyclopentadiene is copolymerized by ring opening with (1) norbornene, at least one alkylnorbornene or a mixture thereof and (2) at least one acyclic monoolefin or nonconjugated acyclic olefin. The copolymers can be calendered and thermoformed, for example, to make rigid automotive goods such as glovebox covers, hubcaps, and the like.
At least one alkylnorbornene, wherein the alkyl group contains from 8 to 12 carbon atoms, is copolymerized by ring opening with (1) at least one acyclic monoolefin or nonconjugated acyclic olefin and (2) optionally, dicyclopentadiene. These copolymers have substantially lower glass transition temperatures than lower alkylnorbornene copolymers and can be injection molded to make appliance housings and the like, or calendered and thermoformed to make, for example, automotive goods such as glovebox covers and the like.
Dimethylnorbornene, isopropylnorbornene or a mixture thereof is copolymerized by ring opening with (1) at least one acyclic monoolefin or nonconjugated acyclic olefin and (2) optionally, dicyclopentadiene. The copolymers are thermoplastics which can be calendered and thermoformed, for example, to make rigid automotive goods such as glovebox covers, hubcaps and the like.