Rigor temperature

The rigorous temperature of these procedures can be avoided when 5-bromo-5 -(bromomcth-yl)dipyrrylmethene hydrobromides 12 a, 5-bromo-5 -(bromomethyl)dipyrrylmethene perbrom-ides 12b or a mixture of both are used, instead of 5-bromo-5 -methyldipyrrylmethene hydrobromides 6. These compounds 12 can be cyclodimerized by heating in formic acid to produce porphyrins. 

Thus the primary and secondary isotope eifects are all within the semiclassical limits and their relationship is in full accord with the semiclassical Swain-Schaad relationship. There is no indication from the magnitudes of the secondary isotope elfects in particular of any coupling between motion at the secondary center and the reaction-coordinate for hydride transfer. Thus the sole evidence taken to indicate tunneling is the rigorous temperature-independence of the primary isotope elfects. 

Enclosure The main cabinet is divided into two compartments one for the magnet, and one for the electronics. The magnet compartment is maintained at a temperature of 24 + 1 °C for ultimate permanent magnet stability. The electronics compartment is on a separate air conditioner and is less rigorously temperature controlled. Fignre 10.11 shows several pictures of a Qualion Process NMR spectrometer in a NEMA enclosure configured for implementation on-line. 

Melamine-formaldehyde aminoplasts filled with alpha-cellulose are suitable for the manufacture of electrotechnical articles operating under rigorous temperature conditions and in a atmosphere of high humidity under load. 

Description For harmonic frequencies, the rigorous temperature dependence of S° is given by... 

This method of calibration provides temperature precision of - O.l C and accuracy of - 0.3 C, which is sufficient for most applications. Studies of polymer melting transitions require more rigorous temperature measurement and the method described by Blake and co-workers is recommended 69, 70). 

---