scholarly journals Structural Study of the Methylnaphthazarins. X-Ray Structure of the Tetramethylnaphthazarin, a Charge Transfer Complex

1986 ◽  
Vol 59 (12) ◽  
pp. 3957-3961 ◽  
Author(s):  
José-Gonzalo Rodriguez ◽  
Alfonso De Pablo ◽  
Pilar Smith-Verdier ◽  
Feliciana Florencio ◽  
Severino Garcia-Blanco
Keyword(s):  
Charge Transfer ◽  
Structural Study ◽  
Charge Transfer Complex ◽  
X Ray ◽  
A Charge

Synthesis and X-Ray Study of a Charge-Transfer Complex of Pyrido[2,3-H]pyrrolo[1,2-a]quinoxaline - 7,7,8,8-Tetracyano-p-quinodimethane (1:1)

1988 ◽  
Vol 41 (6) ◽  
pp. 971 ◽  
Author(s):  
B Viossat ◽  
NH Dung ◽  
JC Daran ◽  
JC Lancelot ◽  
M Robba
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complex ◽  
Three Dimensional ◽  
Direct Methods ◽  
Title Complex ◽  
Full Matrix ◽  
X Ray ◽  
Donor And Acceptor ◽  
A Charge ◽  
Tcnq Molecule

The structure of the title complex has been determined by a three-dimensional X-ray analysis. Triclinic crystals in space group Pī have lattice parameters a 7.0912(8), b 7.692(2), c 19.119(3)Ǻ, α 87.09(2),β 84.01(1),γ 82.72(1)°, Z 2. The structure was solved by means of direct methods and refined by full matrix least squares to R 0.039 and Rw 0.035 for 1671 observed reflections. Almost parallel tetracyanoquinodimethane (tcnq ) and pyridopyrroloquinoxaline molecules are stacked alternately along the a axis. Differences in C-C distances for the complexed tcnq molecule suggest a certain amount of charge-transfer interaction between donor and acceptor molecules.

Radikal-markierte Metallocene (M = Fe, Co). Metallocenylen verbrückte Bis(3-imidazolin-l-oxyle) / Radical Labeled M etallocenes (M = Fe, Co). M etallocenylene B ridged B is(3-im idazolin-l-oxyls)

2001 ◽  
Vol 56 (7) ◽  
pp. 563-570
Author(s):  
Harald Dialer ◽  
Kurt Polbom ◽  
Wolfgang Beck
Keyword(s):  
Charge Transfer ◽  
Radical Anion ◽  
Room Temperature ◽  
Lithium Salt ◽  
Charge Transfer Complex ◽  
Magnetic Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
A Charge ◽  
Different Sources

Abstract Radical Labeled M etallocenes (M = Fe, Co). M etallocenylene B ridged B is(3-im idazolin-l-oxyls) The addition of the lithium salt of the silyl protected hydroxylamine 1-hydroxy-2,2,4,5,5-pentamethyl-3-imidazoline (1) to 6 ,6 -dimethylfulvalene gives the lithium cyclopentadienide 2 from which the 1,1 '-substituted ferrocene and cobaltocinium derivatives 3 and 4 were obtained. Deprotection and oxidation of 3 and 4 afford the metallocenylene bridged bis(3-imidazolin-l-oxyls) 5 and 7. The ferrocene bridged diradical 5 forms with DDQ a charge transfer complex 8 . The complexes 5 and 7 were characterized by X-ray diffraction and by their EPR spectra. Magnetic measurements show at room temperature two independent spins for 5 and 7 and four unpaired electrons for 8 , the latter arising from three different sources [Fe(III) low spin d5, two nitroxides and DDQ- radical anion].

scholarly journals Intermolecular interactions and charge transfer in the 2:1 tetrathiafulvalene bromanil complex, (TTF)2-BA

2011 ◽  
Vol 67 (3) ◽  
pp. 244-249 ◽  
Author(s):  
Pilar García-Orduña ◽  
Slimane Dahaoui ◽  
Claude Lecomte
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Charge Transfer ◽  
Room Temperature ◽  
Charge Transfer Complex ◽  
Structural Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Donor And Acceptor ◽  
A Charge

The crystal structure of the 2:1 charge-transfer complex of tetrathiafulvalene [2,2′-bis(1,3-dithiolylidene)] and bromanil (tetrabromo-1,4-benzoquinone) [(TTF)2-BA, (C6H4S4)2–C6Br4O2] has been determined by X-ray diffraction at room temperature, 100 and 25 K. No structural phase transition occurs in the temperature range studied. The crystal is made of TTF–BA–TTF sandwich trimers. A charge-transfer estimation between donor and acceptor (0.2 e) molecules is proposed in comparison to the molecular geometries of TTF–BA and TTF and BA isolated molecules. Displacement parameters of the molecules have been modeled with the TLS formalism.

ChemInform Abstract: Synthesis and X-Ray Study of a Charge-Transfer Complex of Pyrido(2,3-h)pyrrolo(1,2-a)quinoxaline-7,7,8,8-Tetracyano-p-quinodimethane (1:1)

ChemInform ◽  
1989 ◽  
Vol 20 (3) ◽  
Author(s):  
B. VIOSSAT ◽  
NGUYEN-HUY DUNG NGUYEN-HUY DUNG ◽  
J. C. DARAN ◽  
J. C. LANCELOT ◽  
M. ROBBA
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complex ◽  
X Ray ◽  
A Charge

scholarly journals Multi-configurational Ehrenfest simulations of ultrafast nonadiabatic dynamics in a charge-transfer complex

2018 ◽  
Vol 149 (24) ◽  
pp. 244107 ◽  
Author(s):  
Tianji Ma ◽  
Matteo Bonfanti ◽  
Pierre Eisenbrandt ◽  
Rocco Martinazzo ◽  
Irene Burghardt
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complex ◽  
Nonadiabatic Dynamics ◽  
A Charge

scholarly journals Isolation and X-ray Crystal Structure of an Electrogenerated TEMPO–N3 Charge-Transfer Complex

2021 ◽  
Author(s):  
Hosea M. Nelson ◽  
Juno C. Siu ◽  
Ambarneil Saha ◽  
Duilio Cascio ◽  
Samantha N. MacMillan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Charge Transfer ◽  
Charge Transfer Complex ◽  
X Ray
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