FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2015380900> ?p ?o ?g. }

• W2015380900 endingPage "7087" @default.
• W2015380900 startingPage "7073" @default.
• W2015380900 abstract "Solid-state 93Nb and 13C NMR experiments, in combination with theoretical calculations of NMR tensors, and single-crystal and powder X-ray diffraction experiments, are applied for the comprehensive characterization of structure and dynamics in a series of organometallic niobium complexes. Half-sandwich niobium metallocenes of the forms Cp‘Nb(I)(CO)4 and CpNb(V)Cl4 are investigated, where Cp = C5H5- and Cp‘ = C5H4R- with R = COMe, CO2Me, CO2Et, and COCH2Ph. Anisotropic quadrupolar and chemical shielding (CS) parameters are extracted from 93Nb MAS and static NMR spectra for seven different complexes. It is demonstrated that 93Nb NMR parameters are sensitive to changes in temperature and Cp‘ ring substitution in the Cp‘Nb(I)(CO)4 complexes. There are dramatic differences in the 93Nb quadrupolar coupling constants (CQ) between the Nb(I) and Nb(V) complexes, with CQ between 1.0 and 12.0 MHz for Cp‘Nb(CO)4 and CQ = 54.5 MHz for CpNbCl4. The quadrupolar Carr−Purcell Meiboom−Gill (QCPMG) pulse sequence is applied to rapidly acquire, in a piecewise fashion, a high signal-to-noise ultra-wide-line 93Nb NMR spectrum of CpNbCl4, which has a breadth of ca. 400 kHz. Solid-state 93Nb and 13C NMR spectra and powder XRD data are used to identify a new metallocene adduct coordinated at the axial position of the metal site by a THF molecule: CpNb(V)Cl4·THF. 13C MAS and CP/MAS NMR experiments are used to assess the purity of samples, as well as for measuring carbon CS tensors and the rare instance of one-bond 93Nb, 13C J-coupling, 1J(93Nb,13C). Theoretically calculated CS and electric field gradient (EFG) tensors are utilized to determine relationships between tensor orientations, the principal components, and molecular structures." @default.
• W2015380900 created "2016-06-24" @default.
• W2015380900 creator A5024718019 @default.
• W2015380900 creator A5042771512 @default.
• W2015380900 creator A5048925953 @default.
• W2015380900 creator A5057007265 @default.
• W2015380900 date "2005-07-27" @default.
• W2015380900 modified "2023-09-23" @default.
• W2015380900 title "Solid-State⁹³Nb and¹³C NMR Investigations of Half-Sandwich Niobium(I) and Niobium(V) Cyclopentadienyl Complexes" @default.
• W2015380900 cites W1508073257 @default.
• W2015380900 cites W1528018631 @default.
• W2015380900 cites W1634069537 @default.
• W2015380900 cites W1653832446 @default.
• W2015380900 cites W1668194798 @default.
• W2015380900 cites W1966235885 @default.
• W2015380900 cites W1968951734 @default.
• W2015380900 cites W1970574859 @default.
• W2015380900 cites W1973970608 @default.
• W2015380900 cites W1974952054 @default.
• W2015380900 cites W1976279880 @default.
• W2015380900 cites W1976809927 @default.
• W2015380900 cites W1979024187 @default.
• W2015380900 cites W1981075093 @default.
• W2015380900 cites W1981271915 @default.
• W2015380900 cites W1981706593 @default.
• W2015380900 cites W1982472536 @default.
• W2015380900 cites W1984547239 @default.
• W2015380900 cites W1986947798 @default.
• W2015380900 cites W1990459865 @default.
• W2015380900 cites W1990691004 @default.
• W2015380900 cites W1991719956 @default.
• W2015380900 cites W1992299337 @default.
• W2015380900 cites W1993865094 @default.
• W2015380900 cites W1993872374 @default.
• W2015380900 cites W1996371679 @default.
• W2015380900 cites W2000466466 @default.
• W2015380900 cites W2001512335 @default.
• W2015380900 cites W2002091481 @default.
• W2015380900 cites W2003411947 @default.
• W2015380900 cites W2003656667 @default.
• W2015380900 cites W2006103361 @default.
• W2015380900 cites W2007726650 @default.
• W2015380900 cites W2011660717 @default.
• W2015380900 cites W2017479751 @default.
• W2015380900 cites W2019273763 @default.
• W2015380900 cites W2024955117 @default.
• W2015380900 cites W2026744851 @default.
• W2015380900 cites W2026780055 @default.
• W2015380900 cites W2027201449 @default.
• W2015380900 cites W2029359904 @default.
• W2015380900 cites W2029968912 @default.
• W2015380900 cites W2031502207 @default.
• W2015380900 cites W2035762822 @default.
• W2015380900 cites W2035763981 @default.
• W2015380900 cites W2038848048 @default.
• W2015380900 cites W2039732962 @default.
• W2015380900 cites W2040797419 @default.
• W2015380900 cites W2040916621 @default.
• W2015380900 cites W2041016693 @default.
• W2015380900 cites W2041690243 @default.
• W2015380900 cites W2041978832 @default.
• W2015380900 cites W2042110198 @default.
• W2015380900 cites W2043820998 @default.
• W2015380900 cites W2044060993 @default.
• W2015380900 cites W2044077774 @default.
• W2015380900 cites W2046604087 @default.
• W2015380900 cites W2048246800 @default.
• W2015380900 cites W2050852019 @default.
• W2015380900 cites W2051734165 @default.
• W2015380900 cites W2052545622 @default.
• W2015380900 cites W2052714414 @default.
• W2015380900 cites W2054063639 @default.
• W2015380900 cites W2054164390 @default.
• W2015380900 cites W2055219044 @default.
• W2015380900 cites W2058197189 @default.
• W2015380900 cites W2061695907 @default.
• W2015380900 cites W2062528292 @default.
• W2015380900 cites W2064250184 @default.
• W2015380900 cites W2066480503 @default.
• W2015380900 cites W2070426762 @default.
• W2015380900 cites W2070903204 @default.
• W2015380900 cites W2072966933 @default.
• W2015380900 cites W2075344572 @default.
• W2015380900 cites W2075423749 @default.
• W2015380900 cites W2075616010 @default.
• W2015380900 cites W2076930867 @default.
• W2015380900 cites W2076990080 @default.
• W2015380900 cites W2078086089 @default.
• W2015380900 cites W2079272145 @default.
• W2015380900 cites W2079591606 @default.
• W2015380900 cites W2085663309 @default.
• W2015380900 cites W2085978695 @default.
• W2015380900 cites W2088037817 @default.
• W2015380900 cites W2088618473 @default.
• W2015380900 cites W2089447754 @default.
• W2015380900 cites W2091358026 @default.
• W2015380900 cites W2095472344 @default.
• W2015380900 cites W2098745928 @default.

• next