𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Study of intramolecular hydrogen bonding in β-Diketones

✍ Scribed by H.D. Purohit; S. Kumar; A.D. Vyas

Publisher
Elsevier Science
Year
1980
Weight
504 KB
Volume
17
Category
Article
ISSN
0378-4487

No coin nor oath required. For personal study only.

✦ Synopsis

The permittivity and dielectric loss of acetyl acetone, benzoyl acetone and dibenzoyl methane have been measured at four microwave frequencies viz. 30.20, 24.50, 18.26 and 9.83 GHz and also at 1 MHz and optical frequency at 35'C, in dilute solutions of five different solvents. The permittivity and dielectric loss at different frquencies have been plotted against concentration (wt. fraction). The slopes of these straight lines have been used for the complex plane plots (a" vs a'). The complex plane plots for these compounds are Cole-Cole arcs. The dielectric relaxation time (ro) and distribution parameter (a) have been calculated from these plots. Hydrogen bonding has been studied from dielectric relaxation data.

The effect of various solvents on the keto-enol equilibrium has also been discussed.

📜 SIMILAR VOLUMES

How Strong Are Hydrogen Bonds in Metalla
How Strong Are Hydrogen Bonds in Metalla-β-diketones?
✍ Dirk Steinborn; Sebastian Schwieger 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 476 KB 👁 1 views

## Abstract The energies of the kinetically inert, electronically saturated Lukehart‐type metalla‐β‐diketone [Re{(COMe)~2~H}(CO)~4~] (9 a) and of the kinetically labile, electronically unsaturated platina‐β‐diketones [Pt{(COMe)~2~H}Cl~2~]^−^ (10 a), [Pt~2~{(COMe)~2~H}~2~(μ‐Cl)~2~] (11 a), and [Pt{(

Intramolecular hydrogen bonding of nucle
Intramolecular hydrogen bonding of nucleobases
✍ Geoffrey T. Crisp; Yu-Lin Jiang 📂 Article 📅 2002 🏛 Elsevier Science 🌐 French ⚖ 76 KB

The intramolecular hydrogen bonding of a series of linked uracil, thymine and adenine derivatives is described. The nucleoside bases have been linked by semi-flexible spacers and the chemical shifts and DlNH/DT values for the nucleoside NH protons confirm the strong intramolecular hydrogen bonding m

NMR study of the influence of β-substitu
NMR study of the influence of β-substituents on the intramolecular hydrogen bond in β-dicarbonyl compounds
✍ N. N. Shape'ko 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 258 KB

## Abstract The hydroxyl proton chemical shifts of β‐dicarbonyl compounds involving various β‐substituents have been studied. An additive influence of β‐substituents on the δ~OH~ shift values has been found. The results obtained suggested the existence of only one potential proton energy minimum in