NEODYMIUM(III) NITRIDE

The IUPAC name of Neodymium nitride is azanylidyneneodymium. With the CAS registry number 25764-11-8, it is also named as nitridoneodymium. The other registry numbers are 12033-44-2 and 664346-94-5. This chemical is black powder with ammonia odor. The following is the water solubility (g/100ml) at different temperature (°C): 127 g/0 °C; 142 g/10 °C; 145 g/20 °C; 159 g/30 °C; 211g/50 °C. In addition, it is slightly hazardous to water, so people should not release the material to the environment without proper governmental permits. Furthermore, Neodymium nitride is avoided contact with oxides and acid. It must be sealed in the container and the container should placed in the cool and dry aera. 

The other characteristics of this product can be summarized as: (1)#H bond acceptors: 1; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Exact Mass: 155.910793; (5)MonoIsotopic Mass: 155.910793; (6)Topological Polar Surface Area: 23.8; (7)Heavy Atom Count: 2; (8)Complexity: 10; (9)Covalently-Bonded Unit Count: 1.

Preparation of Neodymium nitride: The following is the reaction equation: NdHg_x(s)＋0.5N₂(g)500～1000°CNdN(s)＋xHg(g)_x=1～4. All operations must be carried out under N₂ or Ar atmosphere.
1. After dehydration, chloride dissolves in methanol, and using graphite anode (d = 12mm) and mercury cathode to electrolyze. Using voltage 40V to ensure that 1 ~ 2A current, and the volum current depends on the distance (10 ~ 20mm) between anode and cathode. The concentration of rare earth chloride is half-saturation and the temperature is about 20 °C. After Electrolyzing 20 ~ 40h, the amalgam flows into the container which is formed by two spherical tube.Using methanol to wash off impurities in the N₂ atmosphere.
2. The rare earth metals contact with mercury (the amount is 20 to 30 times to the rare earth metal) in the glass tube at 300 ~ 350 °C. It can purify the metal as same as the amalgamation. Because rare earth metal oxide is lighter than mercury, it will float on the surface of the amalgam, then we obtain a thick slurry solid which is amalgam that we can directly carry on the nitridation reaction.

People can use the following data to convert to the molecule structure. 
1. SMILES: N#[Nd];
2. InChI: InChI=1/N.Nd/rNNd/c1-2;
3. InChIKey: OVMJQLNJCSIJCH-JTGJHBJXAZ.