Accessing iron amides from dimesityliron

• A new phase of dimesityliron has been crystallized from diethylether; the crystal structure shows a dinuclear complex with co-crystallized solvent. Crystalline [Fe-2(mes)(2)(mu(2)-mes)(2)]center dot Et2O is a convenient starting material and reacts with di(2-pyridyl) amine to yield rare iron di(2-pyridyl) amido complexes. Crystal structures of air-sensitive [Fe-2(mes)(2)(dpa)(2)], [Fe-2(dpa)(3)Cl] and [Fe-4(dpa)(6)O] were determined. [Fe-4(dpa)(6)O] is known, and the dinuclear complexes [Fe-2(mes)(2)(dpa)(2)] and [Fe-2(dpa)(3)Cl] represent only the second and third reports of homometallic iron dpa(-) complexes. Long Fe. Fe distances of 3.043(1) and 3.104(2) angstrom in [Fe-2(mes)(2)(dpa)(2)] and [Fe-2(dpa)(3)Cl], respectively, and very unsymmetrically coordinated amido groups, indicate that the iron atoms are not involved in M-M bonding. This fact, and the relatively low coordination numbers of the high spin Fe(II) atoms are consistent with sensitivity of these compounds towards O-2. DFT calculations were employed to rationalize the formation of the unusual architectures displayed by the dpa(-) complexes of iron. (C) 2015 Elsevier B.V. All rights reserved.

Ämnesord

NATURVETENSKAP  -- Kemi -- Organisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Organic Chemistry (hsv//eng)

Nyckelord

Iron

Mesityl

Amide

METAL ATOM CHAINS

THEORETICAL-ANALYSIS

MAGNETIC-PROPERTIES

CRYSTAL-STRUCTURE

AXIAL LIGAND

COMPLEXES

CHEMISTRY

BONDS

ENERGY

TETRAMESITYLDIIRON

Chemistry

Inorganic & Nuclear

Chemistry

Organic

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