The Vietnam War (1954-1973) was a very long and costly war in which over three million people lost their lives. The United States became involved in the war to support their allies in South Vietnam. The U.S. and South Vietnam were fighting against the communist regime known as the Viet Kong.
Ion-dipole interaction (dipole-ion interaction): A noncovalent attraction between one pole of a bond dipole and an oppositely-charged ion. The Î´+ end of the bond dipole is attracted to an anion, and the Î´- end of the bond dipole is attracted to a cation.
dipole (two pole) is due to existence of PARTIAL positive or negative charge. This charge is due to difference in electro negativity and this charge is represented by DELTA symbol. So the dipole dipole interaction is much less than an ion-ion interaction (in terms of strength).