Unprecedented N-E Bond Cleavage (E=Sn, Pb) by R4N+ Ions (R=nBu, nPr): Formation, Architecture, and Multinuclear Magnetic Resonance Spectroscopy of Novel Supramolecular [(R4N)(Me3E)2M(CN)6⋅H2O] Assemblies (M=Fe, Co)

Abstract

Novel supramolecular assemblies 2 of the composition [(nBu

A Three-Dimensional Coordination Polymer with an Expanded NbO Structure

“…The local coordination environments of Ni and Sn atoms are shown in Figure 2. [14] We are grateful to Dr. [18] The building unit shown in Figure 2 is connected to similar units to form a low-density open framework structure with cubic symmetry Fd3 Å c (Figure 3). [10] Quaternary ammonium fluoride 4 was prepared from the corresponding bromide [9] by passage of a methanolic solution through a column of ion-exchange resin Amberlyst A-26 (OH À ) to afford the corresponding quaternary ammonium hydroxide followed by treatment with one equivalent of HF and removal of solvent in vacuo.…”

“…Bromide 9 is converted into the corresponding fluoride in situ. [14] We are grateful to Dr. Peter Cheng of the Bristol ± Myers Squibb…”

Characterization of a chiral menthyldimethyltin molybdate and its use as an olefin epoxidation catalyst

“…Vibrational spectra were recorded on a Unican Mattson Mod 7000 FTIR spectrometer and on a Bruker RFS 100/S FT Raman spectrometer using a 1064 nm excitation of the Nd/YAG laser. 13 C solid state NMR spectra were recorded at 100.62 MHz on a Bruker Avance 400 (9.4 T) spectrometer. 1 H-13 C crosspolarization (CP) MAS NMR spectra were acquired with a spinning rate of 7 kHz, 4.5 ls 1 H 90°pulses, a contact time of 2 ms and a recycle delay of 4 s. X-ray absorption spectra were measured at ca.…”

“…Addition of the molybdenum shell to the (7) 0.0135 (13) a CN = Coordination number. Values in parentheses are statistical errors generated in EXCURVE.…”

“…One of the most appealing strategies is the formation of coordination networks through the aggregation via intermolecular bonds of two or more modular units. The self-assembly of organotin cationic fragments such as Me 3 Sn + with different anionic metal-containing species has provided a large family of supramolecular organometallic networks with either 1-dimensional (1D), 2D or 3D architectures [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In 1993 Fischer and co-workers described a series of compounds with the general formula [(R 3 E) 2 MO 4 ] (R = Me, Et, nPr, nBu, or Ph; E = Sn or Pb; M = Mo or W) [19].…”