Intramolecular forces, comparison 411 table

Neutron time-of-flight spectra (2<5) for Nylon-6 are given in Fig. 10. A comparison of NIS and infrared data for Nylon-6 (5, 16, 18, 37), and NIS and infrared spectra 30) for n-heptane is given in Table 3. The vibrations of the -( 112)5- segments in Nylon-6 are expected to occur below 600 cm-, where the intramolecular C-C-C deformation and C-C torsional modes in n-paraffins have been shown to occur (7). In view of the transferability established for the intramolecular force constants among the n-paraffins 33), it was of interest to test the degree to which they could be transferred to the —( 112)5 groups of Nylon-6. 

Intramolecular Ru(II) to Cu(II) ET rates have been measured in two other blue copper proteins, stellacyanin [42, 43] and azurin [9, 13, 28]. Pseudomonas aeruginosa azurin has been ruthenated at His83 [13] (Fig. 5). The intramolecular Ru(II) to Cu(II) ET rate of 1.9 s was found to be independent of temperature [28]. The Cu reorganization enthalpy was estimated to be < 7 kcal/mol [13, 28], a value confirming that blue copper is structured for efficient ET. Again, a blue copper ET rate is low in comparison with heme protein rates over similar distances (at similar driving forces) (Table 1). 

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