scholarly journals Reaction behaviour of a complex containing a tungsten phosphorus triple bond with ς-acceptor compounds of group 13

1998 ◽  
pp. 1051-1052 ◽  
Author(s):  
Manfred Scheer ◽  
Jan Müller ◽  
Gerhard Baum ◽  
Manfred Scheer ◽  
Jan Müller ◽  
...  
Keyword(s):  
Triple Bond ◽  
Group 13

Special Interest Group 13 (Swallowing and Swallowing Disorders)

ASHA Leader ◽  
2012 ◽  
Vol 17 (5) ◽  
Author(s):  
Debra Suiter ◽  
Laurie Sterling ◽  
Lynne Brady Wagner
Keyword(s):  
Interest Group ◽  
Special Interest ◽  
Swallowing Disorders ◽  
Special Interest Group ◽  
Group 13

On the Linear Geometry of Lanthanide Hydroxide (Ln—OH, Ln=La-Lu)

2019 ◽  
Author(s):  
Hassan Harb ◽  
Lee Thompson ◽  
Hrant Hratchian
Keyword(s):  
Triple Bond ◽  
Density Functional ◽  
Valence Electron ◽  
Density Functional Theory Calculations ◽  
Electron Configuration ◽  
Functional Theory ◽  
Key Species ◽  
Pi Orbitals ◽  
Lanthanide Hydroxide ◽  
Linear Geometry

Lanthanide hydroxides are key species in a variety of catalytic processes and in the preparation of corresponding oxides. This work explores the fundamental structure and bonding of the simplest lanthanide hydroxide, LnOH (Ln=La-Lu), using density functional theory calculations. Interestingly, the calculations predict that all structures of this series will be linear. Furthermore, these results indicate a valence electron configuration featuring an occupied sigma orbital and two occupied pi orbitals for all LnOH compounds, suggesting that the lanthanide-hydroxide bond is best characterized as a covalent triple bond.

On the Linear Geometry of Lanthanide Hydroxide (Ln—OH, Ln=La-Lu)

2019 ◽  
Author(s):  
Hassan Harb ◽  
Lee Thompson ◽  
Hrant Hratchian
Keyword(s):  
Triple Bond ◽  
Density Functional ◽  
Valence Electron ◽  
Density Functional Theory Calculations ◽  
Electron Configuration ◽  
Functional Theory ◽  
Key Species ◽  
Pi Orbitals ◽  
Lanthanide Hydroxide ◽  
Linear Geometry

Lanthanide hydroxides are key species in a variety of catalytic processes and in the preparation of corresponding oxides. This work explores the fundamental structure and bonding of the simplest lanthanide hydroxide, LnOH (Ln=La-Lu), using density functional theory calculations. Interestingly, the calculations predict that all structures of this series will be linear. Furthermore, these results indicate a valence electron configuration featuring an occupied sigma orbital and two occupied pi orbitals for all LnOH compounds, suggesting that the lanthanide-hydroxide bond is best characterized as a covalent triple bond.

scholarly journals Lysine clonixinate versus dipyrone (metamizole) for the acute treatment of severe migraine attacks: a single-blind, randomized study

2008 ◽  
Vol 66 (2a) ◽  
pp. 216-220 ◽  
Author(s):  
Abouch Valenty Krymchantowski ◽  
Henrique Carneiro ◽  
Jackeline Barbosa ◽  
Carla Jevoux
Keyword(s):  
Acute Treatment ◽  
Rescue Medication ◽  
International Headache Society ◽  
Randomized Study ◽  
Group 13 ◽  
Lysine Clonixinate ◽  
Inflammatory Drugs ◽  
Rectal Indomethacin ◽  
Single Blind ◽  
Severe Migraine

BACKGROUND AND OBJECTIVE: Nonsteroidal anti-inflammatory drugs (NSAID) are effective to treat migraine attacks. Lysine clonixinate (LC) and dipyrone (metamizol) have been proven effective to treat acute migraine. The aim of this study was to evaluate the efficacy and tolerability of the intravenous formulations of LC and dipyrone in the treatment of severe migraine attacks. METHOD: Thirty patients (28 women, 2 men), aged 18 to 48 years with migraine according the International Headache Society (IHS) (2004) were studied. The patients were randomized into 2 groups when presenting to an emergency department with a severe migraine attack. The study was single-blind. Headache intensity, nausea, photophobia and side effects were evaluated at 0, 30, 60 and 90 minutes after the drug administration. Rectal indomethacin as rescue medication (RM) was available after 2 hours and its use compared between groups. RESULTS: All patients completed the study. At 30 minutes, 0% of the dipyrone group 13% of the LC group were pain free (p=0.46). At 60 and 90 minutes, 2 (13%) and 5 (33%) patients from the dipyrone group and 11 (73%) and 13 (86.7%) patients from the LC group were pain free (p<0.001). At 60 minutes, significantly more patients from the LC group were nausea-free (p<0.001). Regarding photophobia, there were no differences between groups at 60 minutes (p=0.11). The use of RM at 2 hours did not differ among groups (p=0.50). Pain in the site of the injection was reported by more patients of the LC group compared to the dipyrone group (p<0.0001). CONCLUSION: LC is significantly superior to dipyrone in treating severe migraine attacks. LC promotes significantly more burning at the site of the injection.

scholarly journals Isolation of Neutral, Mono‐, and Dicationic B 2 P 2 Rings by Diphosphorus Addition to a Boron−Boron Triple Bond

2021 ◽  
Author(s):  
Tobias Brückner ◽  
Felipe Fantuzzi ◽  
Tom E. Stennett ◽  
Ivo Krummenacher ◽  
Rian D. Dewhurst ◽  
...  
Keyword(s):  
Triple Bond
Sign in / Sign up

Export Citation Format

Share Document