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.
Antigua is about 200 square miles and has an estimated population of 250000 only. It is an independent town who got its freedom from UK in 1981. Antigua connects the three biggest islands of the world with distinctive boundary lines. Andorra is a 180 square miles town which is governed by the President of France.