ChemInform Abstract: Novel Structural Motifs in Organometallic Chemistry by Boron-Nitrogen ( Phosphorus) Donor-Acceptor Bonding

ChemInform ◽  
2010 ◽  
Vol 28 (40) ◽  
pp. no-no
Author(s):  
F. JAEKLE ◽  
M. WAGNER
Keyword(s):  
Organometallic Chemistry ◽  
Structural Motifs ◽  
Donor Acceptor ◽  
Nitrogen Phosphorus ◽  
Boron Nitrogen

Impurity distribution profiles in ion-implanted silicon

1968 ◽  
Vol 46 (6) ◽  
pp. 597-606 ◽  
Author(s):  
W. J. Kleinfelder ◽  
W. S. Johnson ◽  
J. F. Gibbons
Keyword(s):  
Incident Energy ◽  
Impurity Distribution ◽  
Square Root ◽  
Silicon Crystals ◽  
Maximum Range ◽  
Nitrogen Phosphorus ◽  
Boron Nitrogen ◽  
Ion Implanted

A p–n junction location technique for determining ion-implanted profiles of dopant ions in semiconducting substrates is described. This method allows detection of the implanted concentration up to eight orders of magnitude below the peak. Distributions of boron, nitrogen, phosphorus, and arsenic ions implanted in [Formula: see text] oriented silicon crystals as well as boron in [Formula: see text] silicon crystals are given. The samples were implanted at energies from 10 to 70 keV and were annealed during implant at 625 °C. The results are compared to theoretical estimates. In the cases of boron and arsenic in [Formula: see text] silicon, and boron in [Formula: see text] silicon, a definite maximum range Rmax is apparent. In these cases Rmax increases as the square root of the incident energy, indicating a channeling phenomenon. The phosphorus profiles do not show a maximum range, but rather decrease exponentially with depth for five orders of magnitude in concentration.

Non-symmetric pincer ligands: complexes and applications in catalysis

2015 ◽  
Vol 44 (40) ◽  
pp. 17432-17447 ◽  
Author(s):  
Matthew Asay ◽  
David Morales-Morales
Keyword(s):  
Organometallic Chemistry ◽  
Chemical Properties ◽  
Pincer Ligands ◽  
Physical And Chemical Properties ◽  
Structural Motifs ◽  
Physical And Chemical ◽  
The Impact ◽  
And Chemical Properties

Non-symmetric pincer ligands and their complexes have become relevant in different areas of chemistry greatly increasing the pincer structural motifs known and hence their physical and chemical properties. The impact of these species in organometallic chemistry and catalysis is discussed in this perspective.

Applications of boron–nitrogen and boron–phosphorus adducts in organometallic chemistry

2002 ◽  
Vol 652 (1-2) ◽  
pp. 11-19 ◽  
Author(s):  
Kuangbiao Ma ◽  
Matthias Scheibitz ◽  
Stefan Scholz ◽  
Matthias Wagner
Keyword(s):  
Organometallic Chemistry ◽  
Boron Nitrogen

Donor-acceptor substituted ferrocenes. Novel structural motifs by intramolecular acid-base pairing

1995 ◽  
Vol 502 (1-2) ◽  
pp. 123-130 ◽  
Author(s):  
Frieder Jäkle ◽  
Mike Mattner ◽  
Thomas Priermeier ◽  
Matthias Wagner
Keyword(s):  
Base Pairing ◽  
Acid Base ◽  
Structural Motifs ◽  
Donor Acceptor

Boron, Nitrogen, and Fluorine Nuclear Quadrupole Coupling and the Electronic Structure of the Boron—Nitrogen Single Bond

1986 ◽  
Vol 41 (1-2) ◽  
pp. 203-205 ◽  
Author(s):  
J. Olliges ◽  
A. Lötz ◽  
J. Voitländer ◽  
H. Barfuss ◽  
G. Böhnlein ◽  
...  
Keyword(s):  
Negative Charge ◽  
Double Resonance ◽  
Ionic Character ◽  
Single Bond ◽  
Quadrupole Coupling ◽  
Time Differential ◽  
Donor Acceptor ◽  
Accelerated Protons ◽  
Nuclear Quadrupole ◽  
Boron Nitrogen

The 11B and 19F nuclear quadrupole couplings in F3BNHx(CH3)3-x compounds are reported. The boron quadrupole couplings were measured by quadrupole perturbed NMR in the solid state. The fluorine quadrupole couplings were obtained by the time-differential observation of the angular distribution of the gamma radiation after excitation of the fluorine nuclei with accelerated protons (TDPAD). The results are discussed in connection with the nitrogen quadrupole couplings in F3BNHxR3-x compounds, and the nitrogen and boron quadrupole couplings in H3BNHxR3-x: compounds which were previously determined by nuclear quadrupole double resonance. In the F3BNHxR3-x series of compounds, the donor-acceptor character of the B -N bond appears to be less im portant than in the H3BNHxR3-x compounds in favour of a more ionic character of the bond with a higher negative charge on nitrogen.

BN-Substituted coronene diimide donor–acceptor–donor triads: photophysical, (spectro)-electrochemical studies and Lewis behavior

2021 ◽  
Author(s):  
Jonas Hoffmann ◽  
Denis Jacquemin ◽  
Muriel Hissler ◽  
Anne Staubitz
Keyword(s):  
Electronic Properties ◽  
Polyaromatic Hydrocarbons ◽  
Molecular Structures ◽  
Electrochemical Studies ◽  
Donor Acceptor ◽  
Boron Nitrogen

Boron/nitrogen substituted polyaromatic hydrocarbons (PAHs) are unique materials, with similar molecular structures to their carbon/carbon analogs, but different electronic properties.

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