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Oligomers indicators

The absence of higher oligomers indicated that the furylic radicals 39 and 40 were unable to propagate and only coupled with either a primary radical or between... [Pg.87]

Thermal denaturation studies on 15-mer oligomers indicated that 45 has a preference for base-pairing with dG compared to dA (Fig. 49)... [Pg.140]

Figure 4. Comparison of hydrolase and lyase mechanisms from the depolymerization of polygalacturonic acid. Polygalacturonic acid sequences (structure at left) may be depolymerized via hydrolytic cleavage, (indicated by arrows to the left of o-linkages) to yield saturated oligomeric products indicated by the structures at upper right. Alternatively, eliminative depolymerization (indicated by arrows to the right of o-linkages) yields A-4,5-unsaturated oligomers indicated by the structures at lower right. Figure 4. Comparison of hydrolase and lyase mechanisms from the depolymerization of polygalacturonic acid. Polygalacturonic acid sequences (structure at left) may be depolymerized via hydrolytic cleavage, (indicated by arrows to the left of o-linkages) to yield saturated oligomeric products indicated by the structures at upper right. Alternatively, eliminative depolymerization (indicated by arrows to the right of o-linkages) yields A-4,5-unsaturated oligomers indicated by the structures at lower right.
UV and NMR spectroscopy of all the oligomers indicate that the component pori yrins are essentially isolated from each other electronically. They enclose qren cavities that are accessible to solvent. The Zn-Zn distance in the butadiyne-linked trimer Zn35 is calculated to be around 15.8 A, while in the Pt-Iinked trimer Zna it is around 18 A. [Pg.361]

MO calculations on the oligomers indicate that in the full coplanar trans structure intramolecular delocalisation of n electron takes... [Pg.464]

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See also in sourсe #XX -- [ Pg.28 ]



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