 ;templatestyles src="Chembox/styles.css"/ ;
Chemical compound
Tetra-"n"-butylammonium iodide (TBAI) is a quaternary ammonium salt with an iodide counterion. It is used for synthesizing tetra-"n"-butylammonium triiodide by mixing with iodine.
Properties.
The solid crystal of tetra-"n"-butylammonium iodide is in the monoclinic crystal system. It has space group "C"2/"c". The unit cell has dimensions a=14.2806 b=14.1864 c=19.5951 β=111.149. There are eight formulae in the unit cell (Z=8), which has volume 3702.4 Å3.
The enthalpy of formation ΔfH0 of tetra-"n"-butylammonium iodide is −499 kJ/mol, which is lower than that for the bromide or chloride (−540, −564 kJ/mol).
At lower temperatures with water tetra-"n"-butylammonium iodide forms a clathrate hydrate. The tetra-"n"-butylammonium cation is large and hydrophobic. The absolute enthalpy of hydration (from gas phase) is −260 kJ/mol.
The He(I) photoelectron spectrum of tetra-"n"-butylammonium iodide contains a peak at 11 eV due to the tetra-"n"-butylammonium cation, and at 7 and 8 eV due to iodide.
References.
 ;templatestyles src="Reflist/styles.css" / ;