Di-(1-adamantyl)iminoxy. Preparation and Dipole Moment

1974 ◽  
Vol 52 (20) ◽  
pp. 3554-3556 ◽  
Author(s):  
D. Lindsay ◽  
E. C. Horswill ◽  
D. W. Davidson ◽  
K. U. Ingold
Keyword(s):  
Dipole Moment ◽  
Solid State ◽  
Spin Density ◽  
Room Temperature ◽  
Dipole Moments ◽  
Crystalline Material ◽  
Unpaired Spin Density ◽  
Unpaired Spin

The di-(1-adamantyl)iminoxy radical, (1-Ad)2C=NO•, has been prepared from the corresponding imine. It is a blue, crystalline material that is stable indefinitely in air at room temperature in the solid state. Dipole moments have been measured in benzene at 30° for the radical (2.90 D), for (1-Ad)2C=NH (2.49 D), and for (1-Ad)2C=NOMe (0.79 D). In the radical the unpaired spin density on nitrogen is estimated to be ca. 25%.

Unpaired Spin Density in OrderedFe3Al

1961 ◽  
Vol 123 (4) ◽  
pp. 1163-1171 ◽  
Author(s):  
S. J. Pickart ◽  
R. Nathans
Keyword(s):  
Spin Density ◽  
Unpaired Spin Density ◽  
Unpaired Spin

scholarly journals Solid State Structure of 2,2,4,4,6,6-Hexa(β-naphthyloxo)cyclophosphazatriene and Dipole Moments of Hexa(aryloxo)cyclophosphazatrienes

1989 ◽  
Vol 44 (5) ◽  
pp. 575-581 ◽  
Author(s):  
Giuliano Bandoli ◽  
Umberto Casellato ◽  
Mario Gleria ◽  
Antonio Grassi ◽  
Enzo Montoneri ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Solid State ◽  
Crystal And Molecular Structure ◽  
Dipole Moments ◽  
X Ray ◽  
Substituent Group ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Solid State Conformation ◽  
Do So

The crystal and molecular structure of [NP(OC10H7)2]3 was determined by X-ray analysis.The dipole moments of this compound and of the hexa(phenoxo)cyclotriphosphazatrienes of formula [NP(OC6H3XX′Y)2]3 (X = X′ = H, Y = p-Br; X = m-CH3,. X′ = H. Y = p-Cl; X = X′ = m-CH3, Y = p-Cl; X = X′ = m-CH3, Y = H; X = X′ = H, Y = p-CH(CH3)2; X = X′ = H, Y = p-C(CH3)3) were measured in benzene at 25°C. Crystals of [NP(OC10H7)2]3 are monoclinic with unit cell dimensions a = 24.870(15), b = 7.712(8), c = 27.687(14) Å, β = 115.85(7)°; space group P21/c. The structure was refined to an agreement factor of 0.09. The phosphazene ring deviates (max. deviation 17°) from planarity. and mean distances (A) and angles (°) are P-N 1.58(1). P-O 1.58(1), O-C 1.41(2); P-N-P 120(1), N-P-N 119(1), P-O-C 124(2). The conformations of the naphthyloxo groups at P(2) and P(3) are similar, and different from the group at P(1).Dipole moment analysis showed that the solid state conformation changes in the solution state. The measured value was in agreement with a symmetric conformation in which at the O-P-O plane each naphthyloxo group is rotated by ca. 40-50° from the anti-coplanar arrangement relative to this plane. The dipole moment data for the p-substituted phenoxo derivatives agree with such a conformation, but the analysis of the dipole moment values of phosphazenes having phenoxo groups bearing more than one substituent group and p-CH(CH3)2 substituent failed to do so due to the inherent limitations of the method.

Controlling Electron Transfer Dynamics in Donor−Bridge−Acceptor Molecules by Increasing Unpaired Spin Density on the Bridge†

2007 ◽  
Vol 111 (24) ◽  
pp. 6728-6737 ◽  
Author(s):  
Erin T. Chernick ◽  
Qixi Mi ◽  
Amy M. Vega ◽  
Jenny V. Lockard ◽  
Mark A. Ratner ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Spin Density ◽  
Unpaired Spin Density ◽  
Unpaired Spin ◽  
Acceptor Molecules

Organophosphazenes. 25. The synthesis and electrochemistry of the dicobalt hexacarbonyl complexes of phenylethynylcyclophosphazenes

2002 ◽  
Vol 80 (11) ◽  
pp. 1393-1397 ◽  
Author(s):  
Maneesh Bahadur ◽  
Christopher W Allen ◽  
William E Geiger ◽  
Adam Bridges
Keyword(s):  
Spin Density ◽  
Nmr Spectra ◽  
Esr Spectra ◽  
Radical Anions ◽  
Electrochemical Studies ◽  
Unpaired Spin Density ◽  
Unpaired Spin ◽  
Electron Reduction ◽  
Dicobalt Hexacarbonyl

The syntheses of the dicobalt hexacarbonyl complexes, N3P3F6-n(C[Formula: see text]CPhCo2(CO)6)n (n = 1 (3), n = 2 (4)), is reported. The introduction of the organometallic fragment allows for simplification of the NMR spectra and separation of the isomers of the disubstituted (4) derivatives. Electrochemical studies show that 3 undergoes a reversible one-electron reduction. At 233 K, the geminal isomer of 4 undergoes two separate reversible one-electron reductions. The ESR spectra of the radical anions of 3 and 4 have been obtained and show the absence of delocalization of unpaired spin density from the organometallic cluster to the phosphazene.Key words: cyclophosphazenes, cobalt–alkyne clusters, electrochemistry, ESR.

Dipolmomente der 1.2-Di-(pyridyl)-äthene / Dipole Moments of 1,2-Dipyridyl-ethylenes

1970 ◽  
Vol 25 (9) ◽  
pp. 917-927 ◽  
Author(s):  
H.-H. Perkampus ◽  
P. Müller
Keyword(s):  
Dipole Moment ◽  
Room Temperature ◽  
Dipole Moments ◽  
Mean Values ◽  
The Individual

The dipole moments of the six isomeric trans-1,2-dipyridyl-ethylenes were measured in benzene at room temperature. As some dipyridyl-ethylenes can exist in several different conformations the dipole moments are mean values for all conformations. It is shown that the dipole moments of the individual conformations can be computed of the dipole moment vectors of the pyridine nuclei.

ENDOR Study of the Unpaired Spin Density in KZnF3:Mn2+

1970 ◽  
Vol 41 (3) ◽  
pp. 1116-1118 ◽  
Author(s):  
R. K. Jeck ◽  
J. J. Krebs ◽  
V. J. Folen
Keyword(s):  
Spin Density ◽  
Unpaired Spin Density ◽  
Unpaired Spin
Sign in / Sign up

Export Citation Format

Share Document