Synthesis, characterization and structures of the novel rhenium(IV) complexes trans-[ReCl4{PPh2(OMe)}2], trans-[ReCl4{PPh2(OEt)}2] and trans-[ReCl4(OPPh3)2]
摘要:
trans-Terrachlorobis(methyl-diphenylphosphinite)rhenium(IV) and trans-tetrachlorobis(ethyl-diphenylphosphinite)rhenium(IV) were obtained by recrystallization of the corresponding rhenium(III) phosphinite complexes, [ReCl3L3], in chlorinated solvents. The structures of the compounds consist of discrete molecules with trans-octahedral coordination geometry around the rhenium atom, having Re-P distances between 2.534(1) and 2.555(2) Angstrom and Re-CI distances in the range 2.321(1)-2.336(1) Angstrom, trans-[ReCl4(OPPh3)(2)] is formed during the reaction of triphenyloxonium tetrafluoroborate with [ReNCl2(PPh3)(2)]. P-O bond lengths of 2.033(4) Angstrom have been found, while the Re-Cl bonds are 2.336(2) and 2.344(2) Angstrom, respectively. (C) 1999 Elsevier Science Ltd. All rights reserved.
Excited-State Distortions Determined from Structured Luminescence of Nitridorhenium(V) Complexes
作者:Susan E. Bailey、Rebecca A. Eikey、Mahdi M. Abu-Omar、Jeffrey I. Zink
DOI:10.1021/ic010680m
日期:2002.4.1
The nitridorhenium(V) complexes ReNCl(2)(PCy3)(2) (1), ReNBr(2)(PCy3)(2) (2), ReNCl(2)(PPh3)(2) (3), and ReNBr(2)(PPh3)(2) (4) produce structured emission spectra upon excitation at low temperature. The origin, E(00), occurs at 15 775, 16 375, 15 875, and 16 300 cm(-1), respectively. The vibronic peaks are regularly spaced with an average energy separation corresponding to the Re triple bond N stretching
High-valent nitridorhenium(<scp>v</scp>) complexes containing PNP ligands: implications of ligand flexibility
作者:Nikola S. Lambic、Roger D. Sommer、Elon A. Ison
DOI:10.1039/c7dt03615a
日期:——
methylnitridorhenium complex 3 was found to react differently with CO and isocyanides, leading to the isolation of a Re(V) acyl complex 4 and an isocyanide adduct 6. Two parallel pathways were observed for the reaction of 3 with CO: (1) CO inserts into the Re–Me bond to afford 4, and (2) 3 isomerizes by distortion of the aryl backbone of the PNP ligand to afford the isomer 3′. This is followed by the
Rhenium(III) and rhenium(V) complexes stabilized by the potentially tetradentate ligand tris(2-diphenylphosphinoethyl)amine
作者:Valerio Bertolasi、Andrea Marchi、Lorenza Marvelli、Roberto Rossi、Claudio Bianchini、Isaac de los Rios、Maurizio Peruzzini
DOI:10.1016/s0020-1693(01)00696-x
日期:2002.1
The reaction of the rhenium(V) nitrido complex [Re(N)Cl2(PPh3)2] with the tripodal ligand N(CH2CH2PPh2)3 (NP3 )i n THF gave [Re(N)Cl2( 2 -P,P-NP3)] (1) in which NP3 acts as a tridentate ligand using the nitrogen and two phosphorus donors for coordination. Refluxing 1 in a polar solvent such as ethanol produced [( 4 -NP3)Re(N)Cl]Cl (2) in which NP3 acts as a tetradentate ligand. Treatment of complex
Synthesis of neutral rhenium(V) complexes with fluorinated benzenethiols: the crystal and molecular structure of [ReO(C6H4S-2-F)3(PPh3)]
作者:David Morales-Morales、Yifan Zheng、Jonathan R. Dilworth*、Rocı́o Redón、Hugo Torrens*
DOI:10.1016/s0020-1693(00)00378-9
日期:2001.3
Abstract The complexes [ReO(SRf)3(PPh3)] and [ReN(SRf)2(PPh3)2] [Rf=C6F5 (1) and (6), C6F4-4-H (2) and (7), C6H4-2-F (3) and (8), C6H4-3-F (4) and (9) and C6H4-4-F (5) and (10)] were synthesized in good yields by reacting [ReOCl3(PPh3)2] or [ReNCl2(PPh3)2] and the lead salt of the corresponding fluorobenzenethiol [Pb(SRf)2]. In contrast, when the free thiol HSC6F5 was employed in the presence of NEt3
Reactivity of rhenium(V) complexes containing different cores such as [ReO]3+, [ReNR]3+ and [ReN]2+ toward bis(diphenylphosphino)methane: synthesis and crystal structures
distorted octahedral. Selected bond distances (A) are: ReO(oxide) 1.671(6), ReCl(trans to O) 2.452(3), ReCl(trans to P) 2.365(4) and 2.373(3), ReP 2.439(3) and 2.449(2). The PReP chelation angle is 69.2(1)°. Compound 3 is orthorhombic, space group Pccn, with a=34.843(5), b=8.242(2) and c=19.342(4) A. The molecular complex is roughly octahedral with the oxidized dppm ligand chelated through the