𝔖 Bobbio Scriptorium
✦   LIBER   ✦

11B13C coupling constant in LiB(CH3)4

✍ Scribed by Masaru Yanagisawa; Osamu Yamamoto

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
170 KB
Volume
14
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Coupling constants between ^11^B and ^13^C, ^13^C and ^1^H, and ^11^B and ^1^H were obtained for LiB(CH~3~)~4~ in 1,2‐dimethoxyethane, in which the anion B(CH~3~) is belived to exist as a separate ion pair. The correlations of the coupling constants with the effective nuclear charge of boron, and with the s character of the BC bond, are discussed.

📜 SIMILAR VOLUMES

13C NMR: Stereochemical dependence of th
13C NMR: Stereochemical dependence of the one-bond coupling constant 1J13CH in α-halogenoketones
✍ J. Cantacuzene; R. Jantzen; M. Tordeux; C. Chachaty 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 135 KB

## Abstract The one‐bond coupling constant ^1^__J__ ^13^CH for the halogenated carbon in α‐halogenocyclohexanones is more important when the CH bond is in the equatorial then in the axial position. When a conformational equilibrium is present, the resulting coupling is a linear function of the eq

Carbon-13 chemical shifts and 1J(CH) cou
Carbon-13 chemical shifts and 1J(CH) coupling constants in 3,5 - dehydrodiamantane
✍ Milan Hájek; Jan Třiska; Sergej D. Isajev; Luděk Vodička 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 263 KB

## Abstract ^13^C NMR spectra of 3,5‐dehydrodiamantane were compared with those of diamantanoid compounds with and without a cyclopropane ring. The effect of the cyclopropane ring in 3,5‐dehydrodiamantane is similar to that for the carbon atoms of 2,4‐dehydroadamantane and 2,4‐methano‐2,4‐dehydroad

13C13C spin–spin coupling constants and
13C13C spin–spin coupling constants and 13C isotope effects on 13C chemical shifts in some 4-membered rings
✍ Jukka Jokisaari 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 272 KB

## Abstract The ^13^C^13^C spin–spin coupling constants in natural abundance oxetane, thietane, cyclobutanone, bromo‐and chlorocyclobutane have been measured. Furthermore, the ^13^C isotope‐induced changes in the chemical shifts of the different ^13^C nuclei in the molecules mentioned above are re

13C, 15N coupling constants in substitut
13C, 15N coupling constants in substituted 1,2,4-triazines-4-15N
✍ S. Braun 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 174 KB

## Abstract The ^13^C,^15^N coupling constants in three 1,2,4‐triazine‐4‐^15^N derivatives and in a substituted pyrimidine‐1‐^15^N have been determined and are compared with those in pyridine and quinoline. Of special interest are the data of the 5‐(2‐dimethylamino‐1‐propenyl)‐3,6‐dimethyl‐1,2,4‐tr

Computed coupling constants in X(CH3)nH(
Computed coupling constants in X(CH3)nH(4–n) moieties where X = 13C and 15N+, and n = 0–4: comparisons with experimental data
✍ María-Luisa Jimeno; Ibon Alkorta; José Elguero; Janet E. Del Bene 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 166 KB

Seventy-three unique spin-spin coupling constants have been analyzed for the ten species in the two series X(CH3)nH(4-n), where the central atom X is 13C or 15N+. Thirty-seven experimental values have been obtained from the literature, and several new coupling constants have been measured for the me

Long-range 13C1H coupling constants in 3
Long-range 13C1H coupling constants in 3-carene and α-pinene
✍ Aleksej Y. U. Denisov; Evgenij A. Tyshchishin; Aleksej V. Tkachev; Viktor I. Mam 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 433 KB

## Abstract Long‐range ^13^C^1^H coupling constants exceeding 0.3 Hz were measured for the hydrocarbons 3‐carene and α‐pinene by a heteronuclear 2D __J__‐resolved proton‐flip experiment with selective proton excitation. The dependences of the vicinal ^3^__J__(C, H) coupling constants on the dihedr