Iron(II) high spin and low spin complexes from pentaisopropylcyclopentadienyliron(II)bis(trimethylsilyl)amide

Two new complexes [(C5Me5)FeBr(tmeda)] and [{C5(CHMe2)5}FeN(SiMe3)2] have been synthesized and characterized as high spin iron(II) complexes with typical distances between the iron atom and the center of gravity of the C5 ring (Fe-Cpcent) exceeding 190 pm and displaying paramagnetic behavior in solution. Both are analogues of known complexes, namely the Jonas complex [(C5Me5)FeCl(tmeda)] and the Siemeling "Pogo Stick" [(C5Me5)FeN(SiMe3)2]. The silylamide [{C5(CHMe2)5}FeN(SiMe3)2] was reacted with water to yield the bridged hydroxo dimer [{C5(CHMe2)5}Fe(µ-OH)]2 with high spin iron(II) configuration. With 2,5-dimethylpyrrole the azaferrocene derivative [{C5(CHMe2)5}Fe(NC4H2Me2-2,5)] and with diphenylphosphine a few crystals of the diphosphine hydride [{C5(CHMe2)5}FeH(HPPh2)2] as well as a sample of its dehydrogenative P-P coupling product [{C5(CHMe2)5}FeH(Ph2P-PPh2)] have been obtained, which are both diamagnetic 18 valence electron complexes.

from #MedicinebyAlexandrosSfakianakis via xlomafota13 on Inoreader http://ift.tt/2rwg2o5
via IFTTT