UBC1, UBC4 and UBC5 are functionally overlapping and constitute an enzyme family essential for cell growth and viability. All three mediate selective protein degradation, however, UBC1 appears to function primarily in the early stages of growth after germination of spores. ubc1 mutants generated ...
Structure of the [Zr(H)(PMe3)2Cp2]+ cation of (105a). For clarity, only the ZrH hydrogen atom is shown. Show moreView chapterExplore book Synthetic Methods V – Organocatalysis S. Kotani, M. Nakajima, in Comprehensive Chirality, 2012 6.21.3 Mechanistic Scope of the Chlorination Reaction...
Composition and structure of the alpha-AlF3(0001) surface. Strong Lewis acid catalysts are widely used in a variety of industrial processes including Cl/F exchange reactions. Aluminum fluorides (AlF3) have great potential for use in such reactions. Despite the importance of the surface in the ca...
there are some unusual examples of very stable carbocations that take the form of organic salts. Crystal violet is the common name for the chloride salt of the carbocation whose structure is shown below. Notice the structural possibilities for extensive resonance delocalization...
Second, the central triple bond affords a rigid host structure that maintains—in its free form—intrinsic rotational freedom about the elongated axis which is a prerequisite for spontaneous chiral amplification. Third, 1 consists of a fully conjugated π-system to shift the chiroptical sensor ...
The kinetic behavior of the Lewis base-catalyzed sulfenocyclization of polyenes in hexafluoroisopropyl alcohol (HFIP) was explored. The rate of reaction is not dependent on the electronic properties of the terminal nucleophile, suggesting that this capture step is not rate limiting. Additionally, ...
and since C = O2+is a hard base and Ca2+is a hard acid, C = O2+and Ca2+can be tightly bound, with S moving toward W and combining into new bonds, thus forming an intermediate acid based on the W electronic structure. Li et al[48]explored the potential of Cu-K-Co/AC fordesulfu...