Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | w | x | y | z

|< << >> > |

R hydrogen starts from a cyclohexyl xanthate devoid of a conformational lock. Fifty percent of the resulting olefin mixture represents the thermodynamically more stable Saytzeff product. It stems from an anti-elimination in a substrate conformer with an equatorially disposed xanthate group because the equally equatorially disposed anti-H at Cg is within reach in the corresponding cyclic transition state.

R I diagram of the cooling system of a plant for producing hexogen

R Imidazole Bu3SnH,AIBN,PhCH3,A

R In situ generation of activated VCPs from dihydrothiopyrans and their thermal rearrangement.

R in the charm threshold region as measured by the SLAC-LBL collaboration at SLAG.

R is a methyl or p-cyanoethyl group. is methyl, ethyl or isopropyl. Sa - spacer arm. The reactive phosphite is oxidized to a stable triester by aqueous iodine in the presence of lutidine. At the beginning of each new cycle, any unreacted, carrier-bound 5 -hydroxyl groups are acetylated with acetic anhydride, a process known as capping.

R is an unsaturated group.

R is another Polymer chain.

R is the distance from the proton to the C C midpoint, with the vertical dotted line marking equilibrium .

R is the flow resistance of the forward pipe section, R through R are the variable shape resistances of the control valves, and Ap is the pressure source due to the pump.

R isopropyl . The first elimination in

R Jacquinot and RC. Hauser, Ni. With permission of Wiley-VCH, Germany.

R ld against weight fraction of silicone oil, 0 R is the particle radius and d the separation between the chains. From mass conservation ,i Vd is expected to scale as . The present data seem to confirm this behavior which is an indication of a long-range repulsion between the chains. The solid line is a linear fit. Inset values of d as a function of 0

R like in Penicillin N

R loops formed by mRNA from a K-producing plasmacytoma hybridized to DNA from the same tumor. An R loop is formed when mRNA hybridizes to the complementary DNA strand, displacing the sense DNA strand. In this example, two R loops are formed, one containing C and the other V region sequences. These two loops are separated by a double-stranded intron of -3.7 kb. The tail extending from the C region R loop presumably consists of the poly

R Me R 2- with tBuCN

R n-C zs, PhCHa PhCHEt, adamantyl, cholestanyl, menthyl

R n-Elexyl Ri Cyclohexyl and 11. Reprinted from , with permission from the American Institute of Physics

R nC8H17, tolyl

R nesentauive frec wncy responses of the acosea nd Itfedme srendants in Rgure II3. From Ref. 3.

R NH2 . Chitosan is depolymerized by chitosanases in a maimer similar to the depolymerization of chitin. Type XXV serine protease from Streptomyces griseus also depolymerizes chitosan yielding low molecular weight chitosan and the monomer .

R NHC0CH2CH2.

R NMOj electrochemical

R OC2H5, OC6H13.

|< << >> > |

SEARCH

© 2024 chempedia.info