Mixed-addenda heteropolyacid ; catalysis ; 2-octanol ; hexa noic acid

磷666黄色网站、鉬、釩多元雜多酸亚洲综合无码精品一区二区三区；催化作用精品精品国产高清A级毛片3d；仲辛醇；己酸

Hexa-:six.

六

As for the ester exchange reaction on phosphorus, it was found that N-phosphoryl histidine the fastest one among all of the N-phosphoryl aminoacids. The results studied by MNDO method indicate that due to theparticipation of imidazole group, the formation of hexa-coordinatephosphorus intermediate made the iso-propoxyl which is opposite toimidazole group more active than the other ones and much easier to leave.When iso-propoxyl left, a new penta-coordinate phosphorus intermediate wasformed, and it is sterically favorable to be attacked by an alcohol from theopposite direction of imidazole.

對(duì)于磷上酯交換反應(yīng)国产盗摄在线精品福利，實(shí)驗(yàn)中發(fā)現(xiàn)N-磷酰組氨酸反應(yīng)速度明顯高于其它N-磷酰氨基酸美女被草逼一级A片视频，理論研究表明，側(cè)鍵咪唑基參與下六配位磷中間體形成后，位于咪唑基對(duì)面的異丙氧基反應(yīng)活性大大提高日韩久久性欲片，即從咪唑基的對(duì)面位置發(fā)生異丙氧基的離去和另一分子醇的進(jìn)攻www五月婷婷，在能量上和空間上都是有利的。N-磷酰絲氨酸的磷上酯交換反應(yīng)有著類似的特點(diǎn)91日韩一区。

Tetrazine ring is an energetic nitrogen hexa-heterocyclic group with nitrogen mass fraction of 68.3%,so it is a very effective structure unit in the design of high energetic,insensitive materials.The tetrazine high-nitrogen energetic materials are new kinds of ones researched and reported widely at home and abroad in recent years.

四嗪環(huán)是一種含氮質(zhì)量分?jǐn)?shù)達(dá)68.3%的六元氮雜環(huán)含能基團(tuán)亚洲一区在线视频播放，是設(shè)計(jì)高能鈍感含能材料中非常有效的結(jié)構(gòu)單元；四嗪類高氮含能材料也是近年來國內(nèi)外研究和報(bào)道較多的一種新型含能材料在线看片免费观看视频网址，部分具有生成焓高国产精品无码A∨一区二区三区、熱穩(wěn)定性好和感度較低等特點(diǎn)。

The UV-visible spectra of oxidized and reduced F28Y and F106Y were in agreement with the wild NGB, but the oxidized F28Y＇s Sorer band had a 2 nm blue shift, which suggested that the two mutants still remain hexa-coordinated form.

氧化型和還原型F28Y及F106Y的紫外-可見吸收光譜與野生型相似男人到天堂亚洲一区二区在线观看，僅氧化型F28Y的Soret帶有2nm的藍(lán)移欧美大胆A片，說明這兩種突變體蛋白仍保持六配位形式。F28Y的熒光最大發(fā)射峰明顯紅移（340nm→347nm）黄色网站在线播放AAAAA，表明其熒光基團(tuán)更加暴露于極性環(huán)境中久久机热免费。

The polymer features with two kinds of zinc centers: one is hexa-coordinated by four water ligands, two oxygen atoms of two formates and the other is coordinated by six oxygen atoms of six formates.

該配位聚合物具有兩種Zn配位中心，其中一個(gè)六配位的Zn中心跟四個(gè)水和兩個(gè)甲酸根各一個(gè)氧原子配位夫妻人人摸人人操人人射，另一個(gè)六配位的Zn中心跟六個(gè)甲酸根各一個(gè)氧原子配位亚欧日韩国产视频。