"atom" in inglés with examples - Collocation dictionary inglés
- This type of cluster was already known as is the endohedral Ni@Pb (the cage contains one nickel atom).
- The electronic spectrum of nickel cytochrome c, for example, is interpreted as showing that the nickel atom is six-coordinated, rather than four coordinated.
- The green tetrahydrate has been determined by X-ray crystallography to be octahedral about the central nickel atom, coordinated by four water molecules and two acetate fragments.
- While the nickel atom participates in redox reactions, the iron atom is consistently in a Fe(II) coordination state.
- The formal oxidation state of the central nickel atom therefore ranges from +II to +IV in the above transformations (see Figure).
- This structure is not cyclic; the three nickel atoms are approximately collinear and each pair of them is bridged by two μ oxygen atoms.
- Each nickel atom has tetragonally distorted octahedral geometry, caused by the difference in the length of the Ni-O bonds between the bridging and non-bridging oxygens.
- Thus, although a nickel atom has, in principle, ten valence electrons (4s 3d), its oxidation state never exceeds four.
- The simplest Fe-Ni clusters are of one iron atom and one nickel atom bonded together.
- The nickel atoms are organized corresponding to a "normal" spinel arrangement.
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