200960-40-3Relevant academic research and scientific papers
Reactions of the dirhenium(in, iii) complex c/Y-Re2(n-O2CMe)2C14(H2O)2 that lead to the dirhenium(ni, ii) complexes Re2(u-O2CMe)Cl4(PR3)2 and tetrarheniumcyclodiyne clusters of the type Re4(u-O)4Cl4(PR3)4
Bera, Jitendra K.,Lau, Sophia S.,Famvick, Phillip E.,Walton, Richard A.
, p. 4277 - 4284 (2000)
The reaction of cw-Re2(u-O2CMe)2Cl4(H2O)21 with P(C6H4OMe-/>)3 gives the tetranuclear complex Re4(u-O)4Cl4[P(C6H4OMe-p)3]414 along with the salt [(C6H4OMe-p)3PMe]2Re2Cl815. Compound 14 is the first symmetrical, neutral, tetrarheniumcyclodiyne type cluster that contains phosphine ligands. Complexes of this same type with PPh3 (16) and PMe2Ph (17) have been prepared by alternative methods but have poor solubility properties. The paramagnetic complex Re2(u-O2CMe)Cl4(PPh3)2 2, which is prepared from 1 by reaction with PPh3, undergoes phosphine substitution reactions when treated with dichloromethane solutions of other phosphines. Simple non-redox reactions can occur upon reaction of 2 with monodentate and bridging bidentate phosphines to afford complexes of the types Re2(u-O2CMe)Cl4(PR3)2 [PR3 = PBz3 3, P(C6H4OMe-/j)3 4 or PMePh2 5] and fra/w-Re2(u-O2CMe)Cl4(u-PP)2 [PP = dppm 9, Ph2PNHPPh210 or (Ph2P)2C=CH211J. However, reactions that lead either to reduction to dirhenium(ii) complexes or Re-Re bond cleavage are encountered in the case of the reactions of 2 with PMePh2, PMe2Ph, PCy3 and dppe; these have led to the isolation of Re2Cl4(PMePh2)4 6, Re2Cl4(PMe2Ph)4 7, ;wi?/_/ra/u-ReOCl3(PCy3)2 8, a-Re2Cl4(dppe)212, and /ra/i.y-[ReO2(dppe)2]Cl 13. The structures of compounds 3, 8, 13, 14 and 15 have been determined by X-ray crystallography. ; The Royal Society of Chemistry 2000.
Complexes of the type M2X4(LL)(LL′) that contain mixed intramolecular phosphine ligand bridges. Synthesis and characterization of β-Re2Cl4(Ph2PCH2PPh 2)(Ph2PCH2CH2PPh2) and related species
Fanwick, Phillip E.,Root, Dawn R.,Walton, Richard A.
, p. 4832 - 4835 (2008/10/08)
The violet dirhenium(II) complexes Re2Cl4(dppm)(dppe), Re2Cl4(dppm)(arphos), and Re2Cl4(dppa)(dppe), where dppm = Ph2PCH2PPh2, dppa = Ph2PNHPPh2, dppe = Ph2PCH2CH2PPh2, and arphos = Ph2PCH2CH2AsPh2, have been prepared by the reaction of Re2Cl4(PMe3)2(LL), where LL = dppm or dppa, with dppe or arphos in refluxing 1-butanol. Alternative synthetic strategies for Re2Cl4(dppm)(dppe) involve the reaction of Re2Cl4(PMe)4 with 2 equiv of dppm and 1 equiv of dppe and the reaction of Re2Cl4(dppm)2 with dppe. The spectroscopic and electrochemical properties of these three mixed phosphine ligand complexes are in accord with their possessing structures in which the two bidentate ligands assume a bridging transoid disposition to one another. This has been confirmed by a single-crystal X-ray structure analysis on crystals of Re2Cl4(dppm)(dppe) grown from CH2Cl2 solution. This complex crystallizes in the monoclinic space group P21/n with the following unit-cell dimensions: a = 16.985 (4) ?, b = 13.070 (6) ?, c = 22.787 (4) ?, β = 107.94 (2)°, V = 4813 (5) ?3, and Z = 4. The structure was refined to R = 0.061 (Rw = 0.080) for 3807 data with F2 > 3.0σ(F2). The structure is similar to that of β-Re2Cl4(dppe)2 and displays the same sort of disorder. It involves a trans arrangement of intramolecular dppm and dppe bridges and is the first that has been determined in which a multiply bonded dimetal complex contains two different intramolecular phosphine bridges. There is a staggered rotational geometry about the short Re-Re bond (2.237 (1) ?) with average Cl-Re-Re-Cl and P-Re-Re-P torsional angles of 57.6° and 48.9°, respectively.
