Mo(II) complexes: A new family of cytotoxic agents?

Molybdenum(II) Complexes with α‐Diimines: Catalytic Activity in Organic and Ionic Liquid Solvents

“…On the other hand, for the bulkiest t Bu ( 6 ) and CCl 3 ( 8 ) substituents, only the equatorial isomer could be modeled, since it is impossible to avoid an excessive repulsion between one of the substituents and the allyl hydrogens in the axial isomer. Finally, complex 11 displays a small preference for the axial isomer (1.69 kcal mol –1 ), reproducing what has also been observed for the bpy and phen analogues, [Mo(CF 3 SO 3 )(η 3 ‐C 3 H 5 )(CO) 2 (bpy)] and [Mo(CF 3 SO 3 )(η 3 ‐C 3 H 5 )(CO) 2 (phen)], and other related complexes . In all of the examples, the substitution of Br by triflate stabilizes the axial isomer.…”

Spectroscopic and Electronic Properties of Molybdacarborane Complexes with Non‐innocently Acting Ligands

“…The products were washed several times with small amounts of CH 2 Cl 2 and acetonitrile at 0 8Ct or emove impurities. The solubility issues are also reflected in solution NMR spectroscopy.S ince all by-products and impuritiesh ave considerably highers olubilities, 1 H, 13 Ca nd 11 BNMR spectra are good evidenceo fh igh purity of 1a,b.1 D 11 B{ 1 H} and 11 BNMR spectra of 1a,b of sufficient quality,a lso in [D 6 ]DMSO,c ould only be recorded by applying av ariant of DEPTH, the so called zero-go-background-suppression, as equencef or suppression of background signals with composite pulses( 908-1808-1808)-zgbs,b yC ory and Ritchey. [18] NMR spectra were recorded in different drya nd degassed deuterated solvents.…”

“…The NMR spectra were recorded with aB RUKER Avance III HD 400 MHz NMR spectrometer at room temperature ( 1 HNMR 400.13 MHz, 11 BNMR 128.38 MHz, 13 CNMR 100.63 MHz). TMS was used as the internal standard in the 1 Ha nd 13 CNMR spectra and all other nuclei spectra were referenced to TMS using the X scale. [54] Mass spectra were recorded with aB ruker Daltonics ESI-qTOF Impact II.…”

“…[6,7] Oxidative addition of or-ganic disulfides is anotherw ay of modifyingt he ligand sphere in molybdacarboranes. [8] While molybdenum(II) complexes with N,N-donor ligands were alreadys uccessfully applied in catalysis, forexample,inolefin epoxidation, [9] epoxidealcoholysis, [10] Friedel-Crafts alkylation [11] or inorganicc lick reaction, [12] in medicine, [13] or in environmental chemistry, [14] no applications have yet been reported for molybdacarboranes. Furthermore,n oi nvestigationso nt he "non-classical" electronic structure of such half-sandwich metallacarboranes have been conducted.…”

“…J HH = 8.2 Hz, 2H,H8,11 ),8.96 (d,3 J HH = 5 6. Hz, 2H,H5,14 ) 13. C{ 1 H} NMR (CD 3 CN): d (ppm) = 55.4 (br s, C cluster -H), 124.9 (s, C arom ,2 ,2'-bpy), 126.6 (s, C arom ,2 ,2'-bpy), 139.7 (s, C arom ,2 ,2'-bpy), 154.3 (s, q C arom , 2,2'-bpy), 156.5 (s, C arom ,2 ,2'-bpy), 260.0 (CO).…”