ABSTRACT
The preparation of Li [[12 C4] I3. H2O and M [12C4]2] 3 [M = Na, K, Cs; 12 C4 = 12- Crown-4 [1, 4, 7, 10-tetra oxacy-clododecan]] was reported, electronic, Raman and NMR spectroscopy were presented. The results indicated that Li fits in the hole of the 12-Crown-4 and forms a complex whose stoichiometry is 1: 1: 1. Na+, K+ and Cs+ [with stoichiometries 1: 2: 1] would most possibly have sandwich structures. Raman Spectra indicate that the I3- of the potassium complex is linear and symmetric. 1HNMR spectra prove the existence of water of crystallization in the Li complex. The 1H and 13 C chemical shifts of the Li complex are more down-field shifted relative to the Na, K and Cs complexes, despite the less electropositive character, this indicated that the Li complex is of different structure