The utility of A-values can be generalized for use outside of cyclohexane conformations. A-values can help predict the steric effect of a substituent. In general, the larger a substituentâs A-value, the larger the steric effect of that substituent. Methyl has an A-value of 1.74 while tert-butyl has an A-value of ~5. Because the A-value of tert-butyl is higher, tert-butyl has a larger steric effect than methyl. This difference in steric effects can be used to help predict reactivity in chemical reactions.
Turner Beach in Antigua. Antigua (/Ã¦nËtiËÉ¡É/ an-TEE-ga), also known as Waladli or Wadadli by the native population, is an island in the West Indies. It is one of the Leeward Islands in the Caribbean region and the main island of the country of Antigua and Barbuda. Antigua and Barbuda became an independent state within the Commonwealth of Nations on 1 November 1981.
The symmetrical, forested Volcan volcÃ¡n De agua stratovolcano forms an impressive backdrop to the historic former capital city Of, Antigua, guatemala opposite the twin volcanoes Of fuego And. acatenangohe historical city of Antigua Guatemala (top-right margin) is surrounded by three major stratovolcanoes in this Landsat view with north to the upper right. Dark-colored Acatenango volcano (upper left) and the unvegetated summit of Fuego volcano lie SW of the city, and Agua volcano (right-center) lies south.