Copper(II) formate

Copper(II) formate ;
Names:	copper formate; cupric formate;
Formula:	Cu(HCOO)2 (anhydrous); Cu(HCOO)2 · 2H2O (dihydrate); Cu(HCOO)2 · 4H2O (tetrahydrate);
Molar mass:	153.580 g/mol (anhydrous); 189.610 g/mol (dihydrate); 225.639 g/mol (tetrahydrate);
Density:	1.831 g/cm3 (anhydrous);
Crystal system:	monoclinic (tetrahydrate); a=8.15 Å, b=8.18 Å, c=6.35 Åα=90°, β=101.083°, γ=90°; monoclinic (dihydrate); a=8.54 Å, b=7.15 Å, c=9.50 Åα=90°, β=98.8°, γ=90°;
Shapes:	https://en.crystalls.info/w/uploads/media/f/f1/Truncated_tetragonal_pyramid.json Truncated tetragonal pyramid Template:Truncated parallelepiped;
Color:	bright-blue; light-blue;
Decomposition point:	~45 °C"~" is not declared as a valid unit of measurement for this property. (tetrahydrate); ~55 °C"~" is not declared as a valid unit of measurement for this property. (dihydrate); 200 °C473.15 K <br />392 °F <br />851.67 °R <br /> (anhydrous);
Stability:	erodes (tetrahydrate)

Description

Inorganic compound, salt of bivalent transitional metal copper and ocranig formic acid. From water solutions crystallizes as tetrahydrate and dihydrate.

Precursors

Reaction between copper(II) hydroxycarbonate, hydroxide or oxide copper (II) and formic acid

Chemical equation:

4HCOOH + Cu₂CO₃(OH)₂ = 2Cu(HCOO)₂ + 3H₂O + CO₂↑

2HCOOH + Cu(OH)₂ = Cu(HCOO)₂ + 2H₂O

2HCOOH + CuO = Cu(HCOO)₂ + H₂O

For preparation of 100.00g of copper(II) formate

tetrahydratetetrahydrate
dihydrate
anhydrous

а 43.24g of hydroxide or 35.25g of oxide and 47.99g of 85%85% formic acid is required.

Add acid to the flask, then add small parts of copper compound with stirring until it will totally dissolve or, if you use carbonate, until carbon dioxide emission will stop. After reaction will stop, filter the solution and use it for crystal growing.

Storage conditions

For crystal storing use hermetic vessel with small amount of saturated solution at the bottom or place wadding moistened with such solution. You can use such alternatives as vessel with vaseline or vegetable oil, organic non-hygroscopic solvent (kerosene, benzine or paraffin). Also you can use acrylate polymer or another kinds of solidifying plastic.

Solubility

TableGraph

Temperature	гр/`100,00` гр water			гр/`100,00` гр ethanol	гр/`100,00` гр formic acid
Temperature	(anhydrous)	(dihydrate)	(tetrahydrate)	(anhydrous)	(anhydrous)
10°C283.15 K <br />50 °F <br />509.67 °R <br />	`5.91`		`8.93`
15°C288.15 K <br />59 °F <br />518.67 °R <br />	`6.94`		`10.44`
20°C293.15 K <br />68 °F <br />527.67 °R <br />	`7.56`		`11.52`	`0.25`
25°C298.15 K <br />77 °F <br />536.67 °R <br />	`9.65`		`14.85`		`0.0107`
30°C303.15 K <br />86 °F <br />545.67 °R <br />	`12.44`		`19.40`
35°C308.15 K <br />95 °F <br />554.67 °R <br />	`16.59`		`26.44`
40°C313.15 K <br />104 °F <br />563.67 °R <br />	`22.74`		`37.40`
45°C318.15 K <br />113 °F <br />572.67 °R <br />	`27.73`	`36.61`
50°C323.15 K <br />122 °F <br />581.67 °R <br />	`34.61`	`46.50`
52°C325.15 K <br />125.6 °F <br />585.27 °R <br />					`0.254`
55°C328.15 K <br />131 °F <br />590.67 °R <br />	`37.63`	`50.94`
60°C333.15 K <br />140 °F <br />599.67 °R <br />	`37.89`
65°C338.15 K <br />149 °F <br />608.67 °R <br />	`38.99`
70°C343.15 K <br />158 °F <br />617.67 °R <br />	`39.86`
140°C413.15 K <br />284 °F <br />743.67 °R <br />					`0.33`

Gallery

Tetrahydrate. Growing from water solution in 3 weeks, using slow evaporation method. Crystals are about ~2 cm in size.Copper(II) formate, http://imgur.com/gallery/copper-formate-SsrQ17Z Dmitry Shintyakov, reddit, Imgur galleryDmitry Shintyakovhttp://imgur.com/gallery/copper-formate-SsrQ17Z Reddit, Imgur gallery
Tetrahydrate. Growing from water solution in 3 weeks, using slow evaporation method. Crystals are about ~2 cm in size.Copper(II) formate, http://imgur.com/gallery/copper-formate-SsrQ17Z Dmitry Shintyakov, reddit, Imgur galleryDmitry Shintyakovhttp://imgur.com/gallery/copper-formate-SsrQ17Z Reddit, Imgur gallery
Tetrahydrate. Growing from water solution, using slow evaporation method. Crystals are about ~2.5 cm in size.Copper(II) formate, Crystaliczny, redditCrystalicznyReddit
Tetrahydrate. Growing from water solution during 2 months, using slow evaporation method. Crystals are about ~2cm in size.Copper(II) formate, Maxim MartinovMaxim Martinov
Tetrahydrate. Growing from water solution during 2 months, using slow evaporation method. Crystals are about ~2cm in size.Copper(II) formate, Maxim MartinovMaxim Martinov

Video

Sources

Navigation

Copper compounds
Salts	Copper (Cu) • Copper(II) acetate (Cu(CH₃COO)₂) • Copper(II) dihydrophosphate (Cu(H₂PO₄)₂) • Copper(II) formate (Cu(COOH)₂) • Copper(II) lactate (Cu(C₃H₅O₃)₂) • Copper(II) nitrate (Cu(NO₃)₂) • Copper(II) sulfamate (Cu(NH₂SO₃)₂) • Copper(II) sulfate (CuSO₄) • Copper(II) tartrate (CuC₄H₄O₆) • Copper(II) chloride (CuCl₂)
Double salts	Copper-calcium acetate (CuCa(CH₃COO)₄) • Copper(II)-iron(II) sulfate ((Cu,Fe)SO₄) • Copper(II)-ammonium sulfate ((NH₄)₂Cu(SO₄)₂) • Copper(II)-potassium sulfate (K₂Cu(SO₄)₂)
Complexes	Dicarbonatocuprates • Dioxalatocuprates • Bis-thetramethylethylenediaminecopper(II) nitrate ([Cu((H₃CNCH₃)₂C₄H₈)](NO₃)₂) • Glycinecopper(II) sulfate ([Cu(NH₂CH₂COOH)]SO₄) • Copper(II) formate and urea complex (Cu(HCOO)₂ · 2CO(NH₂)₂) • Potassium dioxalatocuprate(II) (K₂[Cu(C₂O₄)₂]) • Sodium dioxalatocuprate(II) (Na₂[Cu(C₂O₄)₂]) • Sodium dicarbonatocuprate(II) (Na₂[Cu(CO₃)₂]) • Tetraamminecopper(II) sulfate ([Cu(NH₃)₄]SO₄) • Tetrachlorocuprates • Tris(hydroxymethyl)methanoaminecopper(II) sulfate ([Cu(NH₂C(CH₂OH)₃)₄]SO₄)

Formates

Barium formate (Ba(COOH)₂) • Calcium formate (Ca(COOH)₂) • Cadmium formate (Cd(COOH)₂) • Copper(II) formate (Cu(COOH)₂) • Copper(II) formate and urea complex (Cu(HCOO)₂ · 2CO(NH₂)₂) • Iron(II) formate (Fe(COOH)₂) • Iron(III) formate (Fe₂(COOH)₃) • Lead(II) formate (Pb(COOH)₂) • Manganese(II) formate (Mn(COOH)₂) • Strontium formate (Sr(COOH)₂) • Zinc formate (Zn(COOH)₂)

Copper(II) formate
Names:	copper formate cupric formate
Formula:	Cu(HCOO)₂ (anhydrous) Cu(HCOO)₂ · 2H₂O (dihydrate) Cu(HCOO)₂ · 4H₂O (tetrahydrate)
Molar mass:	153.580 g/mol (anhydrous) 189.610 g/mol (dihydrate) 225.639 g/mol (tetrahydrate)
Density:	1.831 g/cm³ (anhydrous)
Crystal system:	monoclinic (tetrahydrate) a=8.15 Å, b=8.18 Å, c=6.35 Åα=90°, β=101.083°, γ=90° monoclinic (dihydrate) a=8.54 Å, b=7.15 Å, c=9.50 Åα=90°, β=98.8°, γ=90°
Shapes:	Truncated tetragonal pyramid Template:Truncated parallelepiped
Color:	bright-blue light-blue
Decomposition point:	~45 °C"~" is not declared as a valid unit of measurement for this property. (tetrahydrate) ~55 °C"~" is not declared as a valid unit of measurement for this property. (dihydrate) 200 °C473.15 K <br />392 °F <br />851.67 °R <br /> (anhydrous)
Stability:	erodes (tetrahydrate)