A segmented poly(ether/ester) multiblock copolymer containing acetylene groups within the hard segment was synthesized starting from poly(ethylene glycol) with a number-average molecular weight Mn = 1000, 2-butyne-1, 4-diol and terephthaloyl dichloride. Thermal and spectroscopic data suggest a ...
327 Increased covalency in the CoS bonds was seen in the EPR parameters, indicative of π-backbonding. Substituent effects on the aromatic rings had no effect on the EPR spectra, but these were reflected in the observed redox potentials. Furthermore, the S-donors stabilize the Co ion ...
doi:10.1002/chin.198930303P. BERAUDA. BOURHIMS. CZERNECKIP. KRAUSZWILEY‐VCH Verlag GmbHChemInformBeraud, P., et al., Selective modification of unprotected mono- and disaccharides through ester and ether bonds. Tetrahedron Letters, 1989. 30(3): p. 325-6....
However, the presence of hydrophobic species disturbs the network of H-bonds in water and indirectly influences the properties of a hydrogel. In case of POEGMA networks the ‘primary bound water’ joins to the polar side groups, while the ‘secondary bound water’ interacts mainly with the non...
(11)#Freely Rotating Bonds: 18; (12)Polar Surface Area: 64.61 Å2; (13)Index of Refraction: 1.445; (14)Molar Refractivity: 74.28 cm3; (15)Molar Volume: 278.8 cm3; (16)Polarizability: 29.44×10-24cm3; (17)Surface Tension: 36.2 dyne/cm; (18)Enthalpy of Vaporization: 72.09 kJ/mol; ...
IV. The energy of single bonds and the relative electronegativity of atoms. J. Am. Chem. Soc. 54, 3570 (1932). 16. Holoubek, J. et al. Tailoring electrolyte solvation for Li metal bat- teries cycled at ultra-low temperature. Nat. Energy 6, 303–313 (2021). 17. Chen, S. et al...
ester of chlorosulfonic acid, the trimethylsilyl chlorosulfonate (Cl-SO3-Si(CH3)3) (Figure 4) results in a decrease in the reaction rate, but (1) because of the ester function, no precipitation occurs throughout sulfonation and (2) chain scissions can be avoided, provided the reaction is ...
We envisage that a combination of these two directions could deliver an attractive solution to construct most types of glycosidic bonds, with the potential to overcome current drawbacks. Herein, we demonstrate a highly stereoselective glycosylation method through 2-cyanobenzyl ether functionalization at C...
The isocyanates can also be derivatized by converting isocyanates capable of forming to bonds with one another in such a way that a portion of their isocyanate groups is derivatized to form biuret, allophanat, uretdion or carbodiimide groups. Uretdion groups having dimerization products such as MD...
R1 and R2 can be the same or different to produce an oxydiphthalic anhydride acid, an oxydiphthalic anhydride ester, and an oxydiphthalic anhydride acid ester. The polysulfone etherimides herein may include imide linkages derived from oxydiphthalic anhydride derivatives which have two derivatized ...