N₂H₄-Koordination an Eisen-Schwefel-Zentren: Synthese und Struktur von [N(C₄H₉)₄]₂[μ-N₂H₄{Fe(S₂C₆H₄)₂}₂]/N₂H₄Coordination on Iron Sulfur Centres: Synthesis and Structure of [N(C₄H₉)₄]₂[μ-N₂H₄{Fe(S₂C₆H₄)₂}₂]

Abstract

<jats:title>Abstract</jats:title><jats:p> The reactions of N<jats:sub>2</jats:sub>H<jats:sub>4</jats:sub> and N<jats:sub>2</jats:sub>H<jats:sub>4</jats:sub> · H<jats:sub>2</jats:sub>O respectively, with [N(C<jats:sub>4</jats:sub>H<jats:sub>9</jats:sub>)<jats:sub>4</jats:sub>][Fe(S<jats:sub>2</jats:sub>C<jats:sub>6</jats:sub>H<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub>] are investigated. With N<jats:sub>2</jats:sub>H<jats:sub>4</jats:sub> · H<jats:sub>2</jats:sub>O the complex salt [N(C<jats:sub>4</jats:sub>H<jats:sub>9</jats:sub>)<jats:sub>4</jats:sub>]<jats:sub>2</jats:sub>[μ-N<jats:sub>2</jats:sub>H<jats:sub>4</jats:sub>{Fe(S<jats:sub>2</jats:sub>C<jats:sub>6</jats:sub>H<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub>}<jats:sub>2</jats:sub>] is obtained, the first hydrazine complex of a dithiolato transition metal system, which can be fully characterized. The structure shows, that the compound consists of discrete cations and anions; in the centrosymmetrical anions two [FeS<jats:sub>4</jats:sub>] centres are bridged by a hydrazine ligand with Fe-N distances of 224 pm, N-N distances of 142 pm and Fe-N-N angles of 116.1°. The iron atoms are square pyramidally configurated and located 35 pm above the plane determined by the S atoms.</jats:p>

Synthesis and Characterization of Iron(II) and Ruthenium(II) Hydrido Hydrazine Complexes

“…The geometry about iron is that of a slightly distorted octahedron with the hydride and hydrazine ligands in mutually trans positions. The hydrazine is bound end-on, and the Fe–N distance of 2.0927(11) Å is within the range of those reported for other iron complexes containing end-on bound hydrazine ligands (2.042(3)–2.224(5) Å). , The N–N bond length of 1.4635(17) Å is slightly longer than those reported for other iron–hydrazine complexes (1.432(10)–1.460 Å), including those with side-on or bridging hydrazines, − although shorter than the bridging hydrazine ligand in {[PhBP Ph 3 ]Fe} 2 (μ–η 1 :η 1 -N 2 H 4 )(μ–η 2 :η 2 -N 2 H 2 ) (PhBP Ph 3 = PhB(CH 2 PPh 2 ) 3 – ) (1.465(3) Å) . One proton on the terminal nitrogen is disordered over two positions at 50% occupancy each.…”

Hydrothermal Synthesis, Structures and Magnetic Studies of Transition Metal Sulfates Containing Hydrazine

“…The cis angles of O−M−O and the N−M−O are from 84.74° to 95.26° in 4·Mn , 84.34° to 95.66° in 5·Co, and all trans angles are 180° (Table ). The N−N bond distance (1.465(5) Å for 4·Mn , 1.464(4) Å for 5·Co ) and the angle of M−N−N (116.7° for 4·Mn , 118.98° for 5·Co ) in the hydrazine bridging ligand are similar to the former ones. , Different from 1 − 3 , the structures of 4 − 6 can be regarded as the hydrazine bridged 1D chain M−N 2 H 4 −M which are connected into 3D framework by sulfate anions (Figure b, c and Figure S3 in the Supporting Information). The hydrazine molecules act as a trans bidentate bridging ligands and link the adjacent M 2+ metal ions into the 1D infinite chains, with the M···M distance 5.08 Å. all these 1D chains are parallel to the ab plane, and run along two directions alternately: the a + b direction and a − b direction.…”

Iron–dinitrogen coordination chemistry: Dinitrogen activation and reactivity

“…Nearly all iron N 2 H 4 complexes contain hydrazine bonded in a terminal [109-120] Á 1 geometry or a bridging [108,116,121] Á 1 geometry. Recently an Á 2 coordination mode was observed using iron-phosphine scaffolds [91,92].…”