A “Magnetochemical” Series. Ligand Field Strengths of Weakly Binding Anions Deduced fromS=3/2,5/2Spin State Mixing in Iron(III) Porphyrins

1996 ◽  
Vol 118 (13) ◽  
pp. 3281-3282 ◽  
Author(s):  
Christopher A. Reed ◽  
Frédéric Guiset
Keyword(s):  
Ligand Field ◽  
State Mixing ◽  
Field Strengths

Ligand field strengths and oxidation states from manganese L-edge spectroscopy

1991 ◽  
Vol 113 (21) ◽  
pp. 7937-7940 ◽  
Author(s):  
S. P. Cramer ◽  
F. M. F. DeGroot ◽  
Y. Ma ◽  
C. T. Chen ◽  
F. Sette ◽  
...  
Keyword(s):  
Oxidation States ◽  
Ligand Field ◽  
Field Strengths

Ligand field strengths of carbon monoxide and cyanide in octahedral coordination

2005 ◽  
Vol 58 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Patrick Hummel ◽  
Jonas Oxgaard ◽  
William A. Goddard ◽  
Harry B. Gray
Keyword(s):  
Carbon Monoxide ◽  
Octahedral Coordination ◽  
Ligand Field ◽  
Field Strengths

Ligand Field Strengths of Xanthate and Thioxanthate

1967 ◽  
Vol 46 (5) ◽  
pp. 2009-2010 ◽  
Author(s):  
C. R. Kanekar ◽  
M. M. Dhingra ◽  
V. R. Marathe ◽  
R. Nagarajan
Keyword(s):  
Ligand Field ◽  
Field Strengths

Spectroscopy of chromium(III) in β-quartz and petalite-like transparent glass ceramics: Ligand field strengths of chromium(III)

1984 ◽  
Vol 105 (4) ◽  
pp. 405-408 ◽  
Author(s):  
A. Kisilev ◽  
R. Reisfeld ◽  
E. Greenberg ◽  
A. Buch ◽  
M. Ish-Shalom
Keyword(s):  
Glass Ceramics ◽  
Ligand Field ◽  
Transparent Glass ◽  
Field Strengths

Influence of Phenyl Substituents on Diamagnetic Cobalt(III) Dithiocarbamate Complexes

1990 ◽  
Vol 43 (8) ◽  
pp. 1335 ◽  
Author(s):  
PC Healy ◽  
JV Hanna ◽  
NV Duffy ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Chemical Shifts ◽  
Saturated Hydrocarbon ◽  
Substituent Effects ◽  
Unsaturated Hydrocarbon ◽  
Good Evidence ◽  
Ligand Field ◽  
Electronic Effects ◽  
Space Group ◽  
Methyl Phenyl ◽  
Field Strengths

Single-crystal X-ray structural determinations have been recorded at c.295 K for the tris ( dithiocarbamato )cobalt(III) compounds [Co(S2CNMePh)3] and [Co(S2CNPh2)3]. [Co(S2CNMePh)3] crystallizes in space group P21/a with a 25.207(6), b 12.778(2), c 9.497(2)Ǻ, β 116.40(2)°. [Co(S2CNPh2)3] crystallizes in space group Pī with a 14.979(6), b 13.169(4), c 10.683(3)Ǻ, α 71.53(3),β 88.15(3),γ 82.35(3)°. The structures were refined to residuals of 0.039 and 0.062 for 2184 and 4068 'observed' reflections respectively. The cobalt-59 n.m.r. chemical shift of the sparingly soluble diphenyl compound is found to be 6450 ppm downfield from K3Co(CN)6, compared with 6660 ppm for the methyl phenyl compound and 6830 ppm for the non-phenyl-substituted dimethyl compound, a result reflecting increase in the ligand -field strengths of the ligands in this series of compounds in the order Me2 < Me Ph < Ph2. Average geometric parameters (Ǻ) are: methyl phenyl, Co-S 2.270(6), C-S 1.699(6), C-N 1.341(9), S…S 2.803(2), N-Cphenyl 1.446(5), N-Cmethyl 1.45(1); diphenyl, Co-S 2.267(8), C-S 1.699(4), C-N 1.335(4), S…S 2.805(2), N-Cphenyl 1.449(6). Solid-state carbon-13 chemical shifts for thecarbon atom of the NCS2 fragment are 204, 207 and 210 ppm for [Co(S2CNMe2)3], [Co(S2CNMePh)3] and [Co(S2CNPh2)3] respectively. By comparison, the carbon-13 chemical shifts for cobalt complexes with saturated hydrocarbon substituents which span the range of ligand -field strengths do not show the same systematic trends: [Co(S2CN(CH2)4)3], 201 ppm ; [Co(S2CNEt2)3], 204 ppm ; and [Co(S2CNPri2)3], 204 ppm , [Co(S2CN(CH2Ph)2)3], 207 ppm . For the unsaturated hydrocarbon system, [Co(S2CN(CH)4)3], this value is 211 ppm . These results correspond closely to solution carbon-13 data and constitute good evidence that the ligand substituent effects in the compounds are similar in the two states. The increase in ligand -field strength with phenyl substituent is rationalized in terms of a combination of steric and electronic effects.

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

Comparison of random field strengths in (1-x)SrTiO3-xBiFeO3 and (1-x)SrTiO3-xBaTiO3 relaxor ferroelectrics by means of acoustic emission

2020 ◽  
Vol 92 (2) ◽  
pp. 20401
Author(s):  
Evgeniy Dul'kin ◽  
Michael Roth
Keyword(s):  
Acoustic Emission ◽  
Random Field ◽  
Electric Fields ◽  
Bias Field ◽  
Relaxor Ferroelectrics ◽  
External Bias ◽  
Field Strengths

In relaxor (1-x)SrTiO3-xBiFeO3 ferroelectrics ceramics (x = 0.2, 0.3 and 0.4) both intermediate temperatures and Burns temperatures were successfully detected and their behavior were investigated in dependence on an external bias field using an acoustic emission. All these temperatures exhibit a non-trivial behavior, i.e. attain the minima at some threshold fields as a bias field enhances. It is established that the threshold fields decrease as x increases in (1-x)SrTiO3-xBiFeO3, as it previously observed in (1-x)SrTiO3-xBaTiO3 (E. Dul'kin, J. Zhai, M. Roth, Phys. Status Solidi B 252, 2079 (2015)). Based on the data of the threshold fields the mechanisms of arising of random electric fields are discussed and their strengths are compared in both these relaxor ferroelectrics.

Ligand Field Studies on the Reinecke-Type Complexes with Aniline and Benzylamine

1971 ◽  
Vol 74 (1_2) ◽  
pp. 11-16 ◽  
Author(s):  
I. Gănescu ◽  
Margareta Teodorescu ◽  
C. I. Lepădatu
Keyword(s):  
Field Studies ◽  
Ligand Field
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