4,4'-Difluorobenzophenone (4,4-Difluorobenzophenone; 4 4-Difluorobenzophenone; 4 4'-Difluorobenzophenone) is an intermediate in the synthesis of the polymer PEEK and is also used in the synthesis of Flodafinil (Flmodafinil, Difluoromodafinil), Fladrafinil (Difluoroadrafinil) and Modafiendz (N-Methyl-Flodafinil, N-Methyl-Flmodafinil).
Tony: I synthesized Flodafinil (Flmodafinil) by using 4,4'-Difluorobenzophenone and sodium borohydride in ethanol, then converting the 4,4'-(Difluorophenyl)methanol to 4,4'-(Difluorophenyl)methyl bromide using Hydrobromic acid and Zinc chloride catalyst. Then reacting it with sodium thioglycolate. Then a few more steps and I got Flodafinil.
by CognitiveFuel September 11, 2023
Get the 4,4'-Difluorobenzophenone mug.A high-performance Oldsmobile based on the Cutlass or F-85. Built every year from 1964 to 1980, then in 1985-87. In 1990-91, the Quad 442 was built as a performance package available on the Cutlass Calais.
Originally, the designation meant 4-speed, 4-barrel carburetor and 2 exhausts. From 1965 to 1967, it meant a 400 cubic-inch engine, four-speed transmission and two exhausts. In 1968, the 4-4-2 model became its own separate model, and due to the addition of an automatic transmission option, the designation no longer had its original meaning.
From 1974-1980, it became an appearance package on the Cutlass. From 1985-87, it meant a 4-speed automatic transmission, a 4-barrel carburetor and 2 exhausts.
For its last appearance, it meant a Quad-4 engine, 4 valves per cylinder and 2 camshafts.
Originally, the designation meant 4-speed, 4-barrel carburetor and 2 exhausts. From 1965 to 1967, it meant a 400 cubic-inch engine, four-speed transmission and two exhausts. In 1968, the 4-4-2 model became its own separate model, and due to the addition of an automatic transmission option, the designation no longer had its original meaning.
From 1974-1980, it became an appearance package on the Cutlass. From 1985-87, it meant a 4-speed automatic transmission, a 4-barrel carburetor and 2 exhausts.
For its last appearance, it meant a Quad-4 engine, 4 valves per cylinder and 2 camshafts.
by OldsVistaCruiser January 24, 2011
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The other definition is incorrect. A 4-4-2 formation consists of:
Four defenders
Four midfielders
Two forwards
The goalkeeper stays at the back.
Four defenders
Four midfielders
Two forwards
The goalkeeper stays at the back.
____Striker___Striker_______ 2
L. Mid___Mid___Mid___R. Mid 4
L. Def___Def___Def___R. Def 4
GK
It's a 4-4-2!
L. Mid___Mid___Mid___R. Mid 4
L. Def___Def___Def___R. Def 4
GK
It's a 4-4-2!
by The King of Carrot Flowers July 6, 2006
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See football/soccer
A layout of the ten moveable players (Goalkeeper is stationary).
•Two defenders
•Four midfield
•Four strikers.
A layout of the ten moveable players (Goalkeeper is stationary).
•Two defenders
•Four midfield
•Four strikers.
by Kung-Fu Jesus April 29, 2004
Get the 4-4-2 mug.by Nick Brooks March 20, 2008
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