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Updated: May 26, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
Bis{1,2-bis-[bis-(3-meth-oxy-prop-yl)phosphan-yl]ethane-κP,P'}dichlorido-osmium(II)
Nathaniel K Szymczak1, Lev N Zakharov, David R Tyler
1Department of Chemistry, 1253 University of Oregon, Eugene, Oregon 97403-1253, USA.
Abstract:
In the centrosymmetric title compound, [OsCl(2)(C(18)H(40)O(4)P(2))(2)], the Os(II) atom adopts a trans-OsCl(2)P(4) geometry, arising from its coordination by two chelating diphosphane ligands and two chloride ions. One of the meth-oxy side chains of the ligand is disordered over two orientations in a 0.700 (6):0.300 (6) ratio.
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Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...