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In chemistry, the Verkade base (or Verkade superbase) is a powerful superbase with the formula P(MeNCH 2 CH 2) 3 N. A colorless oil, it is an aminophosphine although its inventor John Verkade called it proazaphosphatrane. The trimethyl derivative or 2,5,8,9-tetraaza-1-phosphabicyclo[3.3.3]undecane is the simplest. [1]
A superbase is a compound that has a particularly high affinity for protons. Superbases are of theoretical interest and potentially valuable in organic synthesis . [ 1 ] [ 2 ] Superbases have been described and used since the 1850s.
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Angus MacAskill (1825 – 8 August 1863) was a Scottish-born Canadian giant. In its 1981 edition the Guinness Book of World Records stated he was the strongest man, the tallest non-pathological giant and the largest true giant in recorded history at 7 feet 9 inches (2.36 m), he also had the largest chest measurements of any non-obese man at 80 inches (203 cm).
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The most active Atlantic hurricane season on record in terms of total storms took place in 2020, with 30 documented. The storm count for the 2020 season also includes fourteen hurricanes, of which seven strengthened to major hurricane status. On the converse, the least active season on record in terms of total storms took place in 1914. The ...
In 1815–1914 the Pax Britannica was the most powerful unitary authority in history due to the Royal Navy's unprecedented naval predominance. [124] During the 19th century, the United Kingdom was the first country in the world to industrialise and embrace free trade, giving birth to the Industrial Revolution.
In 2015, the record which had stood for over 1,000 years, was beaten by fellow Icelander Hafthór Júlíus Björnsson at the World's Strongest Viking competition in Vinstra, Norway. Hafthór carried a 10.06 metres (33.0 ft) long, 1.42 metres (4 ft 8 in) in circumference or 0.45 metres (1 ft 6 in) in diameter, 650 kilograms (1,433 lb) log for ...