Cobalt dihydride

Cobalt dihydride
Cobalt dihydride
Are common
Systematic ; name	Cobalt dihydride
Traditional names	Hydrogen cobalt
Chem. formula	Coh 2
Physical properties
condition	dark gray crystals
Molar mass	60.95 g / mol
Density	0.533 g / cm³
Thermal properties
T. melt.	decomp. 45 ° C
Classification
Pubchem
Chemspider

Cobalt dihydride is an inorganic compound of cobalt metal and hydrogen with the formula CoH ₂ , dark gray crystals, it is slowly oxidized in air and reacts with water.

Content

Getting

The reaction of phenylmagnesium bromide with cobalt (II) chloride in a hydrogen atmosphere:

{\mathsf {CoCl_{2}+2C_{6}H_{5}MgBr+2H_{2}\ {\xrightarrow {}}\ CoH_{2}+2C_{6}H_{6}+MgBr_{2}+MgCl_{2}}}

{\ displaystyle {\ mathsf {CoCl_ {2} + 2C_ {6} H_ {5} MgBr + 2H_ {2} \ {\ xrightarrow {}} \ CoH_ {2} + 2C_ {6} H_ {6} + MgBr_ { 2} + MgCl_ {2}}}}

Physical Properties

Cobalt dihydride forms dark gray crystals, stable in an inert atmosphere up to 45 °.

Chemical Properties

It decomposes with slight heating to form cobalt hydride :

{\mathsf {2CoH_{2}\ {\xrightarrow {45^{o}C}}\ 2CoH+H_{2}}}

{\ displaystyle {\ mathsf {2CoH_ {2} \ {\ xrightarrow {45 ^ {o} C}} \ 2CoH + H_ {2}}}}

Under the influence of water and ethanol decomposes:

{\mathsf {CoH_{2}\ {\xrightarrow {H_{2}O}}\ Co+H_{2}}}

{\ displaystyle {\ mathsf {CoH_ {2} \ {\ xrightarrow {H_ {2} O}} \ Co + H_ {2}}}}

Reacts with acids:

{\mathsf {CoH_{2}+2HCl\ {\xrightarrow {}}\ CoCl_{2}+2H_{2}}}

{\ displaystyle {\ mathsf {CoH_ {2} + 2HCl \ {\ xrightarrow {}} \ CoCl_ {2} + 2H_ {2}}}}

Literature

Chemical Encyclopedia / Redkol .: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1990. - T. 2. - 671 p. - ISBN 5-82270-035-5 .
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1972. - T. 2. - 871 p.