C-C Triple Bond Cleavage/Rearrangement Reaction for Accessing 2,4,4-Trichloronaphthalen-1 (4 H)-ones炔烃联烯酮[2+2]环加成碳碳叁键断裂重组反应2,4,4-三氯萘-1(4H)-酮衍生物以炔烃-联烯酮为原料,水作为亲核试剂,通过N-氯代丁二酰亚胺(NCS)介导的[2+2]环加成和碳碳叁键断裂重组反应合成了...
Conversion of C[triple bond]C to CO in alkynyl-metal complexes: oxidation of carbon chains capped by carbon-tricobalt clusters. 来自 国家科技图书文献中心 喜欢 0 阅读量: 21 作者:MI Bruce,PA Humphrey,NN Zaitseva,BK Nicholson,BW Skelton,AH White ...
{[Ag42(CO3)(C[triple bond]CtBu)27(CH3CN)2][CoW12O40]2}[BF4]: an intercluster sandwich compound.cluster compoundsintercluster compoundspolyoxometalatessilversupramolecular chemistryThe Earl of Sandwich: The first intercluster sandwich compound was obtained from silver alkynyl clusters and [CoW12O40...
Catalytic Double [2+2] Cycloaddition Relay Enabled C-C Triple Bond Cleavage of Yne-Allenones 喜欢 0 阅读量: 55 作者:Li,Heng,Hao,Wen-Juan,Wang,Mian,Qin,Xue,Tu,Shu-Jiang 摘要: An unusual catalytic double [2 + 2] cycloaddition 年份: 2018 ...
The influence of carbon–carbon triple bond polarization on the regiochemistry of the Pauson–Khand reaction has been studied with the B3LYP functional. The regiochemistry determining step of this reaction, i.e., olefin insertion leading to cobaltacycle formation, has been examined with ethylene as...
To predict potentially stable molecules with Si(triple bond)C triple bonding, theoretical calculations at the B3LYP/ 6-311G(d) and CCSD(T)/6-311G(2df) (single-point) levels were employed to study the structures, energetics, and isomerization of various SiCN2 isomers. A schematic potential ...
Ever since Lewis depicted the triple bond for acetylene, triple bonding has been considered as the highest limit of multiple bonding for main elements. Here we show that C2 is bonded by a quadruple bond that can be distinctly characterized by valence-bond (VB) calculations. We demonstrate that...
Iodine also adds a little to the bond length. I asked a colleague and he said, what about about extending the lever (see law of the lever)? Indeed, it adds a little length. His other thought was towards a BN triple bond. Not better than the CC triple bond in TBNBL I. ......
1[大学]有机化学问题一道CH3CN + LDA + cyclohexanone = ? LDA是一种碱,CN之间是triple-bond。网上应该都有。 我的结果是6个C的环。一个C连=O,旁边的一个C连-C-CN。结果却不对,求解。不好意思哈,还是不太明白你说的第3步...cyclohexanone便成cyclohexene了?ene or ane?还有H2C=C=N- N上面有2个...
In this regard, the use of transition-metal catalysts normalizes the pre-existing barrier to prevail a selective C–C bond formation Fig. 1. A suitably designed directing group can coordinate with the transition metal to form a cyclometallated intermediate, thus reaching in the vicinity of the...