"Missing Link" is vintage Frank Herbert. It tells the story of Lewis Orne, junior I-A field man, on the planet Gienah III. He is there to investigate a missing ship, and the natives are nothing but trouble... Originally published in "Astounding Science Fiction" under the editorship of John W. Campbe
N-Propylurea: the missing link
β Scribed by Chohan, Sunil ;Lancaster, Richard ;Pritchard, Robin G.
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 925 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
No coin nor oath required. For personal study only.
β¦ Synopsis
The title molecule, C 4 H 10 N 2 O, is planar and its alkyl chain displays an all-trans configuration, which is typical for nalkylurea structures. Pairs of molecules are hydrogen bonded across crystallographic inversion centres [NΓ Γ ΓO = 2.962 (4) A Λ], with each O atom involved in two additional hydrogen bonds, linking adjacent urea molecules into chains along c [NΓ Γ ΓO = 2.924 (3) and 3.042 (3) A Λ]. Each chain is propagated by a c-glide operation and planes containing adjacent urea molecules intercept at an angle of 50.14 (9) .
π SIMILAR VOLUMES
## Abstract The elusive triplet fluorocarbonyl nitrene, FC(O)N (__X__^3^Aβ²β²), has been generated in high yield from matrixβisolated FC(O)N~3~ by ArF excimer laser photolysis (__Ξ»__=193β nm). As a side product FNCO was formed. The novel nitrene was characterized by IR, UV/Vis, EPR spectroscopy, and q
"Missing Link" is vintage Frank Herbert. It tells the story of Lewis Orne, junior I-A field man, on the planet Gienah III. He is there to investigate a missing ship, and the natives are nothing but trouble... Originally published in "Astounding Science Fiction" under the editorship of John W. Campbe
## Abstract Political forecasting provides the __contextuality__ needed for decisionβmaking and for forecasting βnonβpoliticalβ trends. To gear political forecasting to these needs, rather than mimicking approaches in other areas, requires recognition of the distinctive nature of political trends,