Nickel(II) 1,10-Phenanthroline complexes: cis-[Aqua(Bromo) bis (1,10-Phenanthroline)Nickel(II)] Bromide Trihydrate and ( tris (1,10-Phenanthroline)Nickel(II)] Bromide Octahydrate |
| |
Abstract: | [Ni(phen)2(H2O)Br]Br·3H2O where phen is 1,10-phenanthroline, is a light-blue material which crystallizes in the monoclinic space group P21/c with Z = 4, a = 10.4300(4), b = 25.310(2), c = 9.7790(9)?Å and β = 102.932(6)°. The structure was determined at ambient temperature from 5161 reflections with R = 0.0643 and R w = 0.1306. The structure consists of a complex cation, a bromide anion and three waters of hydration. The Ni atom is pseudo-octahedral with a cis arrangement of Br and H2O. This cis geometry persists in solution, as evidenced by 1H NMR spectroscopy, although the Br may be replaced by another H2O. [Ni(phen)3]Br2·8H2O is a light-red material which crystallizes in the monoclinic space group C2/m with Z = 8, a = 23.6320(11), b = 21.4880(13), c = 15.5470(9)?Å and β = 107.927(3)°. The structure was determined at 120?K from 6820 reflections with R = 0.0733 and R w = 0.1022. The structure consists of a complex cation, two bromide anions and eight waters of hydration. The anions and waters are extensively disordered. The Ni atom is pseudo-octahedral. |
| |
Keywords: | Crystal structure Nickel(II) complexes Phenanthroline NMR of paramagnetic materials |
|
|