The concept of E(G/R), the effect of a ring on the total n-electronic cncrEy of a conju:atcd system has been introduced in previous work, and it has recently been shower that E(G/R) may sometimes bz a comple\-xalued quantic. In rhe presenr paper. conditions under which E(G/R) is real or complex are
✦ LIBER ✦
Factors contributing to the stability of conjugated heterocycles containing a single heteroatom
✍ Scribed by I. Gutman; N. Trinajstić
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 291 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
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## Abstract TGA has been used to study the thermal degradation of PS in atactic (aPS), syndiotactic (sPS), and isotactic (iPS) forms. Thermal stability of sPS is similar to that of aPS, whereas iPS degrades at a notably higher temperature. TGA‐FT‐IR data do not show any obvious difference in the de