73574-37-5Relevant academic research and scientific papers
Synthesis, reactivity, and crystal structure of CpV(CO)3tht (tht = tetrahydrothiophene). A mild-condition synthetic pathway to substitution derivatives of CpV(CO)4 and preparation and X-ray characterization of cis-CpV(CO)2bpy (bpy = 2,2′-bipyridine)
Gambarotta, Sandro,Chiesi-Villa, Angiola,Guastini, Carlo
, p. 99 - 102 (2008/10/08)
Irradiation of CpV(CO)4 in the presence of tht (tht = tetrahydrothiophene) affords the complex CpV(CO)3tht (1), in which one carbonyl group has been replaced by the thioether ligand. 1 reacts readily with several ligands including 2,2′-bipyridine (bpy) and pyrrolidine (pyrr), providing a mild-condition pathway to the new derivatives cis-CpV(CO)2bpy (2) and CpV(CO)3pyrr (3). The structures of 1 and 2 have been determined by X-ray analysis. Both complexes are orthorhombic: 1 has a Pbca space group with a = 14.171 (4) ?, b = 14.184 (5) ?, c = 13.035 (4) ?, V = 2620 (1) ?3, Z = 8, and Dcalcd = 1.461 g cm-3, and the final R factor for 1937 reflections was 0.054; 2 has a Pnma space group with a = 7.687 (4) ?, b = 15.073 (6) ?, c = 12.593 (5) ?, V = 1459 (1) ?3, Z = 4, and Dcalcd = 1.494 g cm-3, and the final R value for 1423 reflections was 0.035. The structure of 3 has been assigned on the basis of its 13C and 1H NMR, IR, and analytical data.
THE COORDINATIVE PROPERTIES OF THE LIGANDS Ph2ECH2EPh2 (E = P, As, Sb) IN CARBONYLVANADIUM COMPLEXES, AND THE MOLECULAR STRUCTURE OF η5-C5H5V(CO)3As2Ph4
Borowski, Renate,Rehder, Dieter,Deuten, Klaus von
, p. 45 - 54 (2007/10/02)
Photo-reaction between the ligands Ph2ECH2EPh2 (E=P: dppm, E=As: dpam, E=Sb: dpsm), L, and the vanadium complexes η5-C5H5V(CO)4 and yields monosubstituted mononuclear (dpsm) and dinuclear, ligand-bridged complexes (dpam, dpsm).With dppm, the final products are disubstituted chelate complexes, but monosubstituted mono- and dinuclear species are formed as intermediates.The shielding of the 51V nucleus decreases in the series dpsm > dppm > dpam and > L > 2μ-L > dppm (=-, η5-C5H5V(CO)4).The half-widths of the NMR signals are greater for dinuclear than for mononuclear complexes.The crystal and molecular structures of η5-C5H5V(CO)3As2Ph4 have been determined.The compound crystallizes in the space group P21/c with a=1347.8, b=1020.0, c=2085.2 pm and β=82.3 deg.Due to steric crowding, the 51V shielding is low compared to that of 5-C5H5V(CO)3>2μ-dpam.
