✦ LIBER ✦

14N- and D-nuclear quadrupole coupling in the rotational spectrum of (CH3)314N…H(D)F: Modification of the electric field gradients at the N and D nuclei

✍ Scribed by A.C. Legon; C.A. Rego

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 620 KB
Volume: 157
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)87242-2

No coin nor oath required. For personal study only.

✦ Synopsis

Ground-staterotational spectra ofthe isotopomers (CH,)9'4N...HFand (CH,),'4N...DFofthe trimethylamine-hydrogen fluoride dimer have been analysed to give spectroscopic constants, including the 14N and D nuclear quadrupole coupling constants, x0.( "'N) and x,~( D), respectively. The changes of these coupling constants from the values in the free molecules (CH3)3'4N and DF have been interpreted to give an estimate of the change induced in the electric field gradient at the appropriate nucleus in response to the presence of the partner subunit.

📜 SIMILAR VOLUMES

Cl and D nuclear quadrupole coupling in

Cl and D nuclear quadrupole coupling in the rotational spectrum of 15N2…DCl and the dynamics of the DCl subunit

✍ N.W. Howard; A.C. Legon 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 509 KB

Nuclear quadrupole coupling constants x(C1) and x(D) have been determined together with the rotational constants BO and centrifugal distortion constants DJ for the linear dimers '5N2...D35CI and '5NZ...D'7Cl. The x(C1) of "N,...H(D)CI have been corrected for the electrical effects due to the presenc

79Br-Nuclear quadrupole coupling in the

79Br-Nuclear quadrupole coupling in the rotational spectrum of HC15N⋯D79Br: determination of the H(D)Br oscillation amplitudes and force constant

✍ A.C. Legon 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 478 KB

The ground-state rotational spectrum of the linear, hydrogen-bonded isotopomer HC'5N...D79Br has been investigated by pulsednozzle Fourier-transform microwave spectroscopy to give the spectroscopic constants &= 1374.4429( 3) MHz, D,= 1.790( ) kHz, x( 79Br) =438.645( 9) MHz and M( 79Br) =2.4( 3) kHz.

H,19F Nuclear-spin-nuclear-spin coupling

H,19F Nuclear-spin-nuclear-spin coupling in the rotational spectrum of (CH3)315N...HF and the lengthening of the HF bond

✍ A.C. Legon; C.A. Rego 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 425 KB

Pulsed-nozzle, Fourier-transform microwave spectroscopy has been used to establish the ground-state spectroscopic constants &,=2734.6105(11) MHz, D,=1.49(7) kHz, DIK=35.3(4) kHz and Dj$= -230(g) kHz for the dimer (CH,),"N...HF from its rotational spectrum. The H,19F spin-spin coupling constant D zF

Proton zero-quantum 2D NMR of 2-propenen

Proton zero-quantum 2D NMR of 2-propenenitrile aligned by an electric field. Determination of the 2H and 14N quadrupole coupling constants

✍ B.H. Ruessink; F.J.J. De Kanter; C. MaClean 📂 Article 📅 1985 🏛 Elsevier Science ⚖ 503 KB

D-nuclear quadrupole coupling in the rot

D-nuclear quadrupole coupling in the rotational spectrum of 15N2…DF and an interpretation of the hyperfine coupling constants χ aaD and DaaHF within a series of complexes B…HF

✍ A.C. Legon; L.C. Willoughby 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 555 KB

Fractures of the facial skeleton. By N.

Fractures of the facial skeleton. By N. L. Rowe, F.D.S.R.C.S., L.R.C.P., M.R.C.S., L.M.S.S.A., H.D.D. R.C.S.; and H. C. Killey, F.D.S. R.C.S., L.R.C.P., M.R.C.S., L.M.S.S.A., H.D.D. R.C.S., Consultants in Oral Surgery, Plastic and Maxillofacial Surgery Unit, Rooksdown House, Basingstoke. With a Foreword by Sir Reginald Watson-Jones. 9 3/4 × 6 3/4 in. Pp. 923 + xxxvi, with 1231 illustrations, 14 in colour. 1955. Edinburgh: E. & S. Livingstone Ltd. £6

📂 Article 📅 1956 🏛 John Wiley and Sons 🌐 English ⚖ 136 KB 👁 3 views

cent dextran in 0.9 per cent saline. Dextran is a polysaccharide which, by differential fractionation of the hydrolysed product, has recently been so confined within the limiting molecular weights that only about 10 per cent is excreted in 24 hours. It is pointed out how all these substitutes tend t