Small gas molecule binding complexes have important applications ranging from understanding ammonia formation in the nitrogen cycle to separating N2 impurities from natural gas. A series of trans-octahedral iron(II) complexes were synthesized containing a bis bidentate phosphine derivatized with 4-vinylbenzyl groups, called the TeSt ligand. Beginning with the FeL2Cl2 complex, a series of reactions were mapped out to afford a wide range of trans-axial ligand substitution patterns. The compounds were characterized spectroscopically and two were characterized via x-ray crystallography.
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