149211-45-0

Basic information

• Product Name: CoI⁽¹⁺⁾
• CAS NO: 149211-45-0
• Molecular Weight: 185.898
• Mol File: 149211-45-0.mol

Chemical Properties

• CAS DataBase Reference: CoI⁽¹⁺⁾(CAS DataBase Reference)
• NIST Chemistry Reference: CoI⁽¹⁺⁾(149211-45-0)
• EPA Substance Registry System: CoI⁽¹⁺⁾(149211-45-0)

Safety Data

• Hazardous Substances Data: 149211-45-0(Hazardous Substances Data)

Upstream product

• 311-28-4 tetra-(n-butyl)ammonium iodide 

Relevant articles and documents

Unusual Thermodynamic Behaviour on Complexation of Cobalt(II) with Chloride, Bromide and Iodide Ions in Hexamethylphosphoric Triamide

The complexation of cobalt(II) with chloride, bromide and iodide ions has been studied by spectrophotometry and calorimetry in hexamethylphosphoric triamide (HMPA) containing 0.1 mol dm-3 (n-C4H9)4NClO4 as a constant ionic medium at 25 deg C.The formation of n>(2-n)+ (n = 1-4 with X as Cl, n = 1-3 with X as Br and n = 1 and 2 with X as I) is proposed, and their formation constants, enthalpies and entropies are determined.Electronic spectra of individual cobalt(II) halogeno complexes are also extracted, indicating that the cobalt(II) ion is four-coordinated in HMPA (unlike other oxygen-donor solvents which show six-coordination), and four-coordinate tetrahedral n(HMPA)4-n>(2-n)+ (n = 1-4) are formed stepwise.In spite of the remarkably strong donicity of HMPA compared to other aprotic donor solvents, the ΔH10 values of formation of + are even smaller, or more negative, in HMPA than in the others.Indeed, for + unusual exothermicity in HMPA is observed in contrast to endothermicity in N,N-dimethylformamide or dimethyl sulphoxide.This suggests that, although being sterically allowed, the four-coordination of 2+ is considerably crowded for bulky HMPA molecules, and Co-O(HMPA) bonds are thus elongated to some extent.