204524-79-8

Upstream product

• 526192-55-2 cis,mer-[ReBr(CO)2(PPh₂(OMe))3] 
• 14220-21-4 rhenium(I) pentacarbonyl bromide 
• 4020-99-9 diphenylphosphinous acid methyl ester 

Downstream Products

• 526192-55-2 cis,mer-[ReBr(CO)2(PPh₂(OMe))3] 
• 367513-79-9 mer,trans-[Re(H₂O)(CO)3(methyldiphenylphosphinite)2][BF₄] 

Relevant academic research and scientific papers

Synthetic, spectroscopic and structural studies of the rhenium(I) dicarbonyl complexes of phosphite, phosphonite, and phosphinite ligands: cis,mer-[ReBr(CO)2{PPh3-n(OR)n}3] (R = Me, Et; n = 1-3)

The reaction of [ReBr(CO)5] with phosphite and phosphonite ligands in toluene yielded cis,mer-[ReBr(CO)2L3] (2: L = P(OMe)3 2a: P(OEt)3 2b: PPh(OMe)2 2c: PPh(OEt)2 2d). Compounds 2c and 2d were also obtained, as were the phosphinite complexes 2e [L = PPh2(OMe)] and 2f [L = PPh2(OEt)], by reaction of the corresponding phosphorus ligand with trans,mer-[ReBr(CO)3L2]. Compounds 2 were all characterized by elemental analysis, mass spectrometry and NMR spectroscopy, and the structures of 2b, 2c and 2d were determined by X-ray diffractometry. Compounds 2a-d are stable in chloroform and dichloromethane, but 2e and 2f are transformed into the corresponding trans,mer[ReBr(CO)3L2] complexes by a reaction for which a partial mechanism is put forward.

Synthesis, structure and reactivity of bromo- and aquatricarbonylrhenium(I) phosphinite and phosphonite derivatives

[ReBr(CO)5] reacted with phosphinite or phosphonite ligands in benzene or toluene to yield fac-(1) or mer,trans-(2) complexes, ([ReBr(CO)3(L)2] L = PPh2(OMe), a; PPh2(OEt), b; PPh(OMe)2, c; PPh(OEt)2, d) characterized by elemental analysis, mass spectrometry, IR and NMR (1H, 13C and 31P) spectroscopies, and for complexes 1b, 2c and 2d, X-ray diffractometry was used. Complexes 2a-2d reacted with Ag[BF4] in wet acetone to form moderate yield of mer,trans-[Re(H2O)(CO)3(L)2][BF4] (3). Comparison of the spectra of compounds 3 with those of precursors 2 together with the diffractometric results for compounds 3a-3c, show that all the complexes have the same configuration around the rhenium atom. Crystals of compounds 3 consist of centrosymmetric dimers formed by hydrogen bonds between the water molecules and the BF4- anions. The lability of compounds 3 was explored by 19F and 31P NMR, and in the case of 3c the complex [Re(ν1-BF4)(CO)3 {PPh(OMe)2}2] (4c) was isolated from the mother liquor. Spectroscopic and diffractometric studies of 4c show monodentate coordination of the tetrafluorborato ligand to the rhenium atom.