𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Syntheses with stable isotopes: Urea-13C, urea-12C, and urea-13C-15N2

✍ Scribed by Thomas W. Whaley; Donald G. Ott


Publisher
John Wiley and Sons
Year
1975
Tongue
French
Weight
178 KB
Volume
11
Category
Article
ISSN
0022-2135

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

Urea has been prepared from the reaction of carbon monoxide and ammonia in the presence of sulfur. The reaction has been applied to the synthesis of urea‐^13^C, urea‐^12^C, and urea‐^13^C‐^15^N~2~.


📜 SIMILAR VOLUMES


Syntheses with stable isotopes: Acetic-1
✍ Donald G. Ott; Vernon N. Kerr 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 French ⚖ 260 KB

## Abstract Rhodium‐catalyzed carbonylation of methanol at mild temperature and pressure has been developed for small‐ and large‐scale preparations of the carbon isotope isomers of acetic acid.

Syntheses with stable isotopes: Methanol
✍ D. G. Ott; V. N. Kerr; T. W. Whaley; T. Benziger; R. K. Rohwer 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 French ⚖ 307 KB

## Abstract Hydrogenation of carbon dioxide at mild temperature and preasure utilizing a copper‐zinc‐chromium catlyst has been developed for small‐ and large‐scale preparations of methanol and is applicable to various isotope isomers.

Syntheses with stable isotopes: Thymine-
✍ Carolyn M. Redwine; Thomas W. Whaley 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 French ⚖ 227 KB

## Abstract A three‐step synthesis of thymlne‐2,6‐^13^C~2~ from urea‐^13^C, sodium cyanide‐^13^C, and α‐bromopropionic acid is described. The last reaction involves hydrogenation of α‐cyano‐^13^C‐propionylurea‐^13^C in aqueous acetic acid and produces thymine‐2,6‐^13^C~2~ in 50–60% yield. The mecha

Syntheses with stable isotopes: Acetylen
✍ Thomas W. Whaley; Donald G. Ott 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 French ⚖ 254 KB

## Abstract Acetylene‐^13^C~2~ has been prepared from carbon‐^13^C dioxide and molten lithium following hydrolisis of the resulting lithium carbide‐^13^C~2~. The stable ethylenediamine complex of lithium acetylide‐^13^C~2~ has been obtained from the reaction of acetylene‐^13^C~2~ with __N__‐lithioe

Measurement of urinary total 13C and 13C
✍ Douglas J. Morrison; Brian Dodson; Tom Preston 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 90 KB 👁 1 views

A method of measuring total 13 C excreted in urine after oral administration of lactose [ 13 C]-ureide was developed using isotope ratio mass spectrometry. Furthermore, a method to measure 13 C urea excreted in the urine was developed. Each urine sample collected over a 24 hour period, after adminis

Syntheses with stable isotopes: Sodium c
✍ D. G. Ott; V. N. Kerr; T. G. Sanchez; T. W. Whaley 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 French ⚖ 336 KB

## Abstract Hydrogenation of carbon‐^13^C dioxide over ruthenium‐on‐alumina catalyst at 300–400°C produced methane‐^13^C, which was passed with excess ammonia over platinum at 1000°C to give, after absorption of the product in sodium hydroxide solution, sodium cyanide‐^13^C in 90% overall yield. Me