Addition compounds of niobium(IV) halides and zirconium(IV) chloride formed with 1,2-dimethylthioethane. Synthesis, spectra, and magnetism

Early Transition Metal Complexes of Polydentate and Macrocyclic Thio- and Seleno-Ethers

“…The complexes are poorly soluble in non-coordinating solvents and hydrolyse easily. The structure of [CrCl 3 {[18]aneS 6 }] reveals a fac octahedral geometry with [18]aneS 6 bonded through three neighbouring sulfurs, 38 and Cr K-edge EXAFS data have been reported for other examples. 36 If the reactions of [CrX 3 (thf) 3 ] (X = Cl, Br sometimes I) and thiacrowns are conducted in the presence of a halide abstractor such as TlPF 6 or AgPF 6 , the products are [CrX 2 (L)]PF 6 (L = [14]aneS 4 , [16]aneS 4 ), 36,39 and there are analogues with [16]aneSe 4 .…”

“…5). 25 (X = Cl, Br or I) were reported many years ago, 18 but need structural authentication, and it is possible than 6-coordinate analogues could be prepared.…”

“…However, the larger ZrCl 4 or HfCl 4 form both 1:1 and 1:2 complexes with dithioethers and diselenoethers. 14,18 It is difficult to obtain pure samples of the complexes directly from the polymeric MCl 4 , and displacement of hard donor ligands such as the tetrahydrofuran in [ZrX 4 (thf) 2 ] is unsuccessful. A better route is reaction of [MCl 4 (Me 2 S) 2 ] with L-L in CH 2 Cl 2 .…”

Synthesis, properties and crystal structures of 6-, 7- and 8-coordinate Zr(iv) and Hf(iv) complexes involving thioether and selenoether ligands

“…This behaviour is similar to that seen for the TiCl 4 /PhSe(CH 2 ) 2 SePh system. 12 However, under appropriate conditions, the discrete (and relatively soluble) [MCl 17 These occur at ca. 300 (M = Zr) and ca.…”

Niobium tetrachloride complexes with thio-, seleno- and telluro-ether coordination – synthesis and structures

“…although with limited spectroscopic and no crystallographic data. [15][16][17] There are no reports of selenoether or telluroether analogues.…”