4 4 Photocycloaddition - significado y definición. Qué es 4 4 Photocycloaddition
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Qué (quién) es 4 4 Photocycloaddition - definición

WIKIMEDIA DISAMBIGUATION PAGE
4-2-4; 4–2–4; 4-2-4 (disambiguation)

4+4 Photocycloaddition         
  • FMO Orbital Theory depiction of a 4+4 photocycloaddition.
  • English: 4-mesyloxypyran-2-ones with pendent furans occurred with high exo selectivity, displaying stereochemical control exists in 4+4 photocycloaddition reactions.
  • A 4+4 cycloaddition occurring over two 2+2 cycloaddition steps.
CHEMICAL REACTION
4+4 photocycloaddition
The [4+4] Photocycloaddition is a cycloaddition reaction in which two unsaturated molecules connect via four atoms from each molecule (hence "4 + 4") to create an eight-membered ring. As a photochemical reaction, it is promoted by some form of light, as opposed to a thermal process.
Matthew 4:4         
VERSE OF THE BIBLE
Mt. 4:4
Matthew 4:4 is the fourth verse of the fourth chapter of the Gospel of Matthew in the New Testament. Jesus, who has been fasting in the desert, has just been tempted by Satan to make bread from stones to relieve his hunger, in this verse he rejects this idea.
AD 4         
YEAR
757 AUC; 4 AD; 4 (year); 4 A.D.; 4 CE; Events in 4; Births in 4; Deaths in 4; 4 anno domini
AD 4 was a common year starting on Wednesday or a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a leap year starting on Tuesday of the Proleptic Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Catus and Saturninus (or, less frequently, year 757 Ab urbe condita).

Wikipedia

424 (disambiguation)

424 is a year in the 5th century of the Gregorian calendar.

424 or 4-2-4 may also refer to:

  • 424 BC, a year in the 5th century BC of the Gregorian calendar
  • MÁV Class 424, a class of Hungarian steam locomotives
  • Area code 424, California, United States
  • 4-2-4 (locomotive), a steam locomotive configuration in Whyte notation
  • 4-2-4 (association football), an association football (soccer) field formation