Syntheses and Structures of Two Selenite Chloride Hydrates: Co(HSeO3)Cl · 3 H2O and Cu(HSeO3)Cl · 2 H2O

✍ Scribed by Magnus G. Johnston; William T. A. Harrison

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: German
• Weight: 132 KB
• Volume: 626
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/1521-3749(200012)626:12<2487::aid-zaac2487>3.0.co;2-e

✦ Synopsis

The first selenite chloride hydrates, Co(HSeO 3 )-Cl ´3 H 2 O and Cu(HSeO 3 )Cl ´2 H 2 O, have been prepared from solution and characterised by single-crystal X-ray diffraction. The cobalt phase adopts an unusual ªone-dimensionalº structure built up from vertex-sharing pyramidal [HSeO 3 ] 2± , and octahedral [CoO 2 (H 2 O) 4 ] 2± and [CoO 2 -(H 2 O) 2 Cl 2 ] 4± units. Inter-chain bonding is by way of hydrogen bonds or van der Waals' interactions. The atomic arrangement of the copper phase involves [HSeO 3 ] 2± pyramids and Jahn-Teller distorted [CuCl 2 (H 2 O) 4 ] and [CuO 4 Cl 2 ] 8± octahedra, sharing vertices by way of Cu±O±Se and Cu±Cl±Cu bonds. Crystal data: Co(HSeO 3 )Cl ´3 H 2 O, M r = 276.40, triclinic, space group P 1 (No. 2), a = 7.1657(5) A Ê , b = 7.3714(5) A Ê , c = 7.7064(5) A Ê , a = 64.934(1)°, b = 68.894(1)°, c = 71.795(1)°, V = 337.78(7) A Ê 3 , Z = 2, R(F) = 0.036, wR(F) = 0.049. Cu(HSeO 3 )Cl ´2 H 2 O, M r = 263.00, orthorhombic, space group Pnma (No. 62), a = 9.1488(3) A Ê , b = 17.8351(7) A Ê , c = 7.2293(3) A Ê , V = 1179.6(2) A Ê 3 , Z = 8, R(F) = 0.021, wR(F) = 0.024.