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.
Due to its popularity amongst tourists and its very well developed tourism infrastructure, Antigua Guatemala is often used as a central location in which many choose to set up base and from here, visit other tourist areas in Guatemala and Central America.