36643-83-1

Upstream product

• 15602-41-2 sodium hexacarbonylvanadate 
• 7553-56-2 iodine 
• 1663-45-2 1,2-bis-(diphenylphosphino)ethane 
• 13985-78-9 tetraethylammonium hexacarbonylvanadium(-1) 

Relevant academic research and scientific papers

?-Alkenyl and halogeno complexes of vanadium (I and II). The crystal structures of (ClV(CO)2(Ph2PCH2CH2PEt2)2*benzene, Br2V(Me2PCH2CH2PMe2)2 and I2V(Me2PCH2CH2PMe2)2*toluene

Various ?-alkenyl complexes of the general composition (alkenyl)V(CO)6-npm (where n = 2,3 and pm is a potentially m-dentate phosphine coordinated through n of its donor centers, n m) have been prepared by photo-induced hydrovanadation of the alkynes 2-butyne, 1-hexyne, 3-hexyne and 3,3-dimethyl-1-butyne.In each case the Z isomer is formed exclusively or as the predominant product.Reaction of hexacarbonylvanadate with pyridinium bromide and pm leads to the bromo complexes BrV(CO)6-npm (n = 2-4).In the case of pm = Me2PCH2CH2PMe2 (dmpe), the complex Br2V(dmpe) is also formed.The complex I2V(dmpe)2*toluene was obtained as a by-product from the reaction between and perfluoro-isopropyl iodide.The face-capped, trigonal-prismatic complex ClV(CO)2(pepe)2*benzene (pepe = Ph2PCH2CH2PEt2) was obtained from the photo-reaction between HV(CO)4pepe and Cl.Single crystal X-ray diffraction studies were carried out on all three complexes.The 51V NMR chemical shifts for the seven-coordinate complexes XV(CO)npm have been used to arrange the ligands X in a magnetochemical series of ligand strengths (alkenyl alkyl Br I N3 CN). Key words: Vanadium; Alkenyl; Phosphine; Crystal structure; Halide

Electron-transfer processes with substituted group 5 metal carbonyls. Synthesis, crystal and molecular structure of Ag3M3(CO)12(Me2PCH2CH2PMe2)3, M = Nb, Ta, the first structurally characterized carbonyl derivatives of niobium(0) and tantalum(0)

Some new tetracarbonyl derivatives of tantalum(I), TaI(CO)4LL (LL = tmeda, dppm, 2,2'-dipy) have been obtained by diiodine oxidation of - in the presence of the bidentate ligand.Dicyclopentadienylcobalt(II) does not react with the tetracarbonyl dppe derivatives of niobium(I) and tantalum(I).MI(CO)4dppe, whereas the corresponding pentamethyl substituted complex, CoCp2*, carries out the two-electron transfer to form *>.Finally, oxidation of the - anion, M = Nb, Ta, with the silver(I) salts AgNO2 and AgBF4 gave the hexanuclear mixed metal clusters Ag3M3(CO)12(dmpe)3, which were studied by X-ray diffraction methods.Crystals of Ag3Nb3(CO)12(dmpe)3 are rhombohedric, space group R3c, hexagonal setting, No. 167, a 14.323(1), c 44.772(4) Angstroem, V 7954.6 Angstroem3, Z = 6, Dcalc 1.739 g cm-3, μ(Cu-Kα)162.93 cm-1, F(000) = 4068; R = 0.044.Crystals of the tantalum derivative are isotypic: a 14.274(5), c 44.55(3) Angstroem, V7860.6 Angstroem3, Z = 6, Dcalc 2.095 g cm-3, μ(Mo-Kα) 78.82 cm-1, F(000) = 4644, R = 0.029.The coordination geometry around te group 5 metal may be described as a distorted square antiprism, the coordination sites being filled with the four carbonyl groups, the two silver atoms and the two phosphorous atoms of the bidentate ligand.The central core of the clusters is constituted by two almost regular interpenetrated equilateral triangles of silver and niobium (or tantalum) atoms.Both metal clusters react with dry hydrogen iodide giving silver metal and MI(CO)4(dmpe).

Synthesis of hexacarbonyl derivatives of group 5 metals and electron-transfer processes. Crystal and molecular structure of tetracarbonyl(1,2-bis(diphenylphosphino)ethane)iodotantalum

Vanadium, niobium, and tantalum hexacarbonylmetalate(-I) derivatives of several heterocyclic nitrogen bases, RnB[M(CO)6]n (R = H, Me; n = 1, 2), have been synthesized. In some cases an electron transfer from the hexacarbonylmetalate to the protonated or methylated BRnn+ cation has been observed. Pyridinium halides react with Na[M(CO)6] (M = Nb, Ta) in the presence of 1 equiv of 1,2-bis(diphenylphosphino)ethane (diphos) to give high yields of the halo tetracarbonyl derivatives MX(CO)4(diphos). The red-orange TaI(CO)4(diphos) complex has been studied by X-ray diffraction methods. Crystal data: space group P21/n; Mr 818.3; a = 14.864 (10) ?, b = 9.875 (7) ?, c = 19.335 (13) ?; β = 105.61 (2)°; U = 2733 (3) ?3; Z = 4; Dcalcd = 1.988 g cm-3; F(000) = 1568; μ(Mo Kα) = 52.4 cm-1. The geometry of the seven-coordinate tantalum atom is best described as a capped trigonal prism with the iodide ligand in the capping position. By reaction of Na[Ta(CO)6] with 1 equiv of hydrogen chloride and diphos in toluene, the hydride TaH(CO)4(diphos) has been isolated in good yield.