User:Praseodymium-141/Neodymium/Compounds

Compounds

 * Neodym(III)sulfat.JPGNeodymium(III) acetate.jpg Neodymium(III)_hydroxide.jpg

Some of the most important neodymium compounds include:
 * halides: NdF3; NdCl2; NdCl3; NdBr3; NdI2; NdI3
 * oxides: Nd2O3
 * hydroxide: Nd(OH)3
 * carbonate: Nd2(CO3)3
 * sulfate: Nd2(SO4)3
 * acetate: Nd(CH3COO)3
 * neodymium magnets (Nd2Fe14B)

Some neodymium compounds have colors that vary based on the type of lighting.

Halides
Neodymium can form four trihalides of the form NdX3. They can be prepared by reacting neodymium with the corresponding halogen:


 * 2Nd (s) + 3F2 (g) → 2NdF3 (s) [a violet substance]
 * 2Nd (s) + 3Cl2 (g) → 2NdCl3 (s) [a mauve substance]
 * 2Nd (s) + 3Br2 (g) → 2NdBr3 (s) [a violet substance]
 * 2Nd (s) + 3I2 (g) → 2NdI3 (s) [a green substance]

The dihalides NdCl2 and NdBr2 are dark green solids, with the same crystal structure as PbCl2 and NdI2 is a dark purple solid. They can be obtained in the Nd-NdX3 eutectic system.

Organoneodymium compounds
Organoneodymium compounds are compounds that have a neodymium–carbon bond. These compounds are similar to those of the other lanthanides, characterized by an inability to undergo π backbonding. They are thus mostly restricted to the mostly ionic cyclopentadienides (isostructural with those of lanthanum) and the σ-bonded simple alkyls and aryls, some of which may be polymeric.