Compliance constants for thiophene calculated by an iterative consistency method

An iterative and consistent method for t

An iterative and consistent method for the complex refraction index calculation of absorbent thin films

✍ Mauricio García-Castañeda; Hernan Sánchez-Machet 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 171 KB

Relationship between proton—proton NMR c

Relationship between proton—proton NMR coupling constants and substituent electronegativities. IV—An extended karplus equation accounting for interactions between substituents and its application to coupling constant data calculated by the Extended Hückel method

✍ Lambertus A. Donders; Franciscus A. A. M. De Leeuw; Cornelis Altona 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 797 KB

Some well known Karplus equations are discussed and their shortcomings are indicated. To remedy the problems associated with the experimentally observed non-additive substituent effects on vicinal protowproton coupling constants, an extension given recently is discussed; this accounts for pairwise i