Synthesis, crystal structure and electrochemical properties of [NBu4][Ni(mdt)2]: a potential precursor for new materials (mdt = 1,3-dithiole-4,5-dithiolate)

Monocyclooctatetraenyl(dithiolene)uranium Compounds

“…In all the complexes, the characteristics of the dithiolene ligands, such as the average C(sp 2 )ϪS distances, which vary from 1.720(13) Å in 14 to 1.796(17) Å in 9, and the CϭC distances, which lie between 1.343(10) Å in 12 and 1.394(17) Å in 14, are consistent with those found in [Mo(cp) 2 [27] Special attention should be paid to the folding of the metallacycle as this reflects the interaction of the dithiolene ligand with the metal centre. The S 4 C 2 fragment of the dithiolene ligands is planar within Ϯ0.06 Å and forms a dihedral angle, θ, with the corresponding SϪUϪS plane.…”

Reduction of Dithiocarbonates as a Novel Route to Dithiolene Compounds of Uranium. Crystal Structure of the First Bimetallic Dithiolene Complex of an f-Element

“…In both compounds 3 and 4 , the characteristics of the mdt ligand, i.e., the C(sp 2 )−S distances [average 1.76(2) Å in 3 and 1.75(3) Å in 4 ] and CC distances [1.37(1) Å in 3 and 1.39(2) Å in 4 ], are consistent with those found in [NBu 4 ][Ni(mdt) 2 ] [1.74(2) and 1.36(2) Å] . Although the folding dihedral angles in 3 and 4 are far more important than those encountered in the titanium dithiolene complexes [Ti(Cp)(dmit) 2 ] - (22.00(5)° and 62.53(3)°) 4 and [Ti(Cp)(S 2 C 6 H 4 ) 2 ] - (36.3° and 23.3°) or the enedithiolate derivative [Ti(Cp) 2 (S 2 C 2 H 4 )] (46.1°), suggesting a greater stabilization of the σ 2 ,π-structure, the ethylenic C1−C2 bonds are not elongated any more by interaction with the uranium center.…”

Chromium Acetylide Complex Based Ferrimagnet and Weak Ferromagnet

“…The Cr-N and Cr-C distances (average values: 2.067(3) and 2.073(4) A ˚) are identical with those of [CrCyclam(CtC-Ph) 2 ] þ 34 (2.065(4) and 2.077(3) A ˚), while the Ni-S and C-C distances (2.156(1) and 1.352(6) A ˚) are in good agreement with the values of [Ni(mdt) 2 ] -(2.162(2) and 1.361(10) A ˚). 41 The unit cell of 1 contains two [CrCyclam(CtC-3-thiophene) 2 ][Ni-(mdt) 2 ] molecules, and the crystal structure is characterized by a two-dimensional sheet of cations and anions on the bc plane, in which there are five short intermolecular contacts, as shown in Figure 1b. The short contacts r 1 and r 4 connect the coordinating atoms of a cation (N1, N2) and anions (S1).…”

“…[CrCyclam(CC−Ph) 2 ]OTf (OTf = trifluoromethanesulfonate) and (C 4 H 9 ) 4 N[Ni(mdt) 2 ] were prepared according to literature methods. ,− [CrCyclam(CC-3-thiophene) 2 ]OTf·H 2 O was synthesized by the same method where 3-ethynylthiophene was used rather than phenylacetylene (yield: 55%, anal. calcd for C 23 H 32 Cr 1 F 3 N 4 O 4 S 3 : C, 43.59; H, 5.09; N, 8.84; S, 15.18%, Found: C, 43.22; H, 5.07; N, 8.69; S, 14.99%).…”