Pendant moieties

This finding may be rationalized for the following reasons. The total length of the Me pendant moiety from the cylinder axis is approximately 15 A when the dye moiety is stretched out from the polymer main chain. Since the dye moiety is linked to the main chain via a flexible chemical bond, it may be able to reside at any distance between 3 and 15 A from the cylinder axis. Thus, on average the Me residues would experience the polyanion microenvironment at a distance of about 10 A. 

The selective separation of water from aqueous solutions of isopropanol or the dehydration of isopropanol can be carried out with different membranes, which contain polar groups, either in the backbone or as pendent moieties. For the dehydration of such a mixture, poly(vinyl alcohol) (PVA) and PVA-based membranes have been used extensively. PVA is the primary material from which the commercial membranes are fabricated and has been studied intensively for pervaporation because of its excellent film forming, high hydrophilicity due to -OH groups as pendant moieties, and chemical-resistant properties. On the contrary, PVA has poor stability at higher water concentrations, and hence selectivity decreases remarkably. 

Dendronized polymers are a class of polymers produced by the combination of linear polymers and dendritic molecules as side chain pendant moieties [67-69],... 

The reaction of azetidine-3-thiol hydrochloride 20 with 2-methylthio-l,3-thiazoline 21 in the presence of a catalytic amount of triphenylphosphine afforded 2-(3-mercaptoazetidin-l-yl)-l,3-thiazoline hydrochloride 22 (Equation 2), which is useful for the pendant moiety of new oral 1/3-methylcarbapenem antibiotic L-084 <2002H(56)433>. 

Incidentally, the hydroquinone pendant moiety in eqn. (28) is reversibly electroactive and will be discussed further in Sect. 5.2.1, below. 

The hydrogels can be formed either in vivo or ex vivo. One method of preparation involves the use of prepol5miers. The prepolymers have a PVA backbone and pendant moieties bearing a pol5mierizable group. 

The RCM reactions of malonates have been defined as benchmark substrates for olefin metathesis catalysts [20]. The productive pathway begins with a crossmetathesis reaction to generate an alkylidene intermediate with a pendant olefin. A second, intermediate metallacycle is generated by the intramolecular addition of this pendant moiety, which subsequently releases the cyclized product and an equivalent of ethylene (Scheme 10.18). 

The report is divided into sections that reflect similarities in DTE-ligand design. Systems with common pendant moieties or coordination modes are discussed together. The abbreviations used are based on a compound number given to the ligand and the element symbols of the metal centres present in any resulting complexes. 

A slight dichotomy exists in the writing of vinyl polymer structures. From a correct nomenclature point of view, the pendant moiety appears on the left-hand carbon. Thus poly(vinyl chloride) should be written - CHCl—CH2-)t . However, from a synthesis point of view, the structure is written -(-CH2—CHCl-)jj, because the free radical is borne on the pendant moiety carbon. Thus both forms appear in the literature. 

The acenaphthyl group (ACE, Figure 1) is a particularly interesting aromatic chromophore for studies of energy migration and trapping that can be incorporated as pendant moieties on a polymer backbone. 

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