Nuclear quadrupole resonance of 63Cu and 65Cu in complexes of Cu(I) halides with alkyl pyridines

Coordination of Ortho-Chlorines in Copper (I) and Silver (I) 2,6-Di- and 2,4,6-Trichlorophenolates

“…(Me 3 P) 3 CuCl at 9.16 MHz) [32]. The similarity of the organochlorine NQR spectrum of (Ph 3 P) 2 CuOPhCl 3 to that of (Ph 3 P) 2 AgOPhCl 3 suggests, but by no means proves, a similar structure.…”

“…35,37q NQR spectra were obtained on a Decca superregenerative spectrometer using Zeeman modulation at 77 K, 195 K, and 273 K; for room-temperature searches for 63,65 Cu signals in the frequency range [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] MHz, a Wilks NQR-1A spectrometer was also employed.…”

“…The NQR spectra of the copper(I) complexes were also searched for 63,65 Cu signals, since the Cu NQR frequencies empirically are found to fall in characteristic ranges depending on the coordination geometry about the copper(I) in phosphine and pyridine complexes: the more symmetrical tetrahedral coordination at copper results in low 63 Cu frequencies of 8-17 MHz [31,32] while the less-symmetrical trigonal planar or linear coordination at copper results in higher 63 Cu frequencies of 26-38 MHz [32,33], In (Ph 3 P) 2 CuOPhCl 3 a weak signal was reproducibly detected at 16.987 MHz at 77 K and at 16.197 MHz at 195 K. Although the weakness of the signal allowed no confirmation by its identity by observation of the corresponding 65 Cu signal, the frequency is too low to be an organochlorine and too high to be an inorganic chlorine coordinated to copper(I) (i.e. (Me 3 P) 3 CuCl at 9.16 MHz) [32].…”

63Cu NQR Studies of Three-coordinated Complexes of Cu(I) with an Isocyanide Ligand

“…The frequencies may be compared with those of the £i's(2,6-lutidine)cuprous halides; 38.35, 37.61, and 35.30 for X=C1, Br and I, respectively, while a second crystalline form of the iodide has a resonance frequency of 36.96 MHz, [10]. They thus appear to conform to the general trend that for a given type of complex the more electronegative or the harder the donor atom, the higher the resonance frequency, e.g.…”

Crystal Structure and NQR of Two Copper (I) Complexes of 4,6-Dimethylpyrimidine-2-thione

“…•6CHC13 and 2, [Cu(dmpt)]6 -C 2H 4C12, that were prepared in the course of an extensive investigation of the 63Cu N Q R spectra of a variety of Cu(I) complexes [2][3][4][5][6][7].…”