5-Acetyl-3,7,8,10-tetramethyl-1,5-dihydroalloxazine: crystal structure and extended Hückel calculations for different molecular geometries

1969 ◽  
Vol 0 (21) ◽  
pp. 1250-1251 ◽  
Author(s):  
Rolf Norrestam ◽  
Peder Kierkegaard ◽  
Birgitta Stensland ◽  
Lena Torbjörnsson
Keyword(s):  
Crystal Structure ◽  
Extended Hückel ◽  
Extended Hückel Calculations

Synthesis, Crystal Structure, High-Resolution Optical Spectroscopy, and Extended Hückel Calculations on Cyclometalated [Re(CO)4(ppy)] (ppy = 2-Phenylpyridine)

1997 ◽  
Vol 101 (16) ◽  
pp. 2946-2952 ◽  
Author(s):  
Frederik W. M. Vanhelmont ◽  
Geoffrey F. Strouse ◽  
Hans U. Güdel ◽  
A. Claudia Stückl ◽  
Helmut W. Schmalle
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Optical Spectroscopy ◽  
Extended Hückel ◽  
Extended Hückel Calculations

scholarly journals The Crystal Structure of Calcium-alpha-D-glucoisosaccharate and Some Extended Hückel Calculations on alpha-D-Glucoisosaccharinic Acid.

1968 ◽  
Vol 22 ◽  
pp. 1395-1403 ◽  
Author(s):  
Rolf Norrestam ◽  
Per-Erik Werner ◽  
Marianne von Glehn ◽  
O. Tolboe ◽  
Jaakko Paasivirta
Keyword(s):  
Crystal Structure ◽  
Extended Hückel ◽  
Extended Hückel Calculations

scholarly journals Extended Hückel Calculations in Spectral and Magnetic Studies of Two Distortion Isomers of Bis(1,3-diaminobutane)copper(II) Perchlorate.

1995 ◽  
Vol 49 ◽  
pp. 585-588 ◽  
Author(s):  
Rolf Uggla ◽  
Milan Melník ◽  
Jaana Valo ◽  
Aarne Pajunen ◽  
Markku R. Sundberg ◽  
...  
Keyword(s):  
Magnetic Studies ◽  
Extended Hückel ◽  
Extended Hückel Calculations

Relativistically parameterized extended Hückel calculations

1981 ◽  
Vol 43 (3) ◽  
pp. 557-580 ◽  
Author(s):  
P. Pyykkö ◽  
L. Wiesenfeld
Keyword(s):  
Extended Hückel ◽  
Extended Hückel Calculations

A Modified Extended Hückel Calculations For Q1D-Graphites

1990 ◽  
Vol 214 ◽  
Author(s):  
D. Raković ◽  
R. Kostić ◽  
S. Krstić ◽  
I. Davidova ◽  
B. L. Fayfel ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Density Of States ◽  
Computational Results ◽  
Two Dimensional ◽  
Electronic Density ◽  
Electronic Density Of States ◽  
Energy Gaps ◽  
Extended Hückel ◽  
Extended Hückel Calculations

ABSTRACTIn this paper we have computed electronic density of states for several Q1D graphites: polyacene (PA), polyacenacene (PAA), polyphenanthrene (PP), polyphenanthrophenanthrene (PPhP), and polyperinaphthalene (PPN). The modified extended Hiickel method for finite Q1D chains has been adopted. The change of the electronic properties due to the growth of the Q1D-graphites toward the two-dimensional direction, starting from trans-polyacetylene, cis-polyacetylene or poly(p-phenylene), is discussed. Our calculations show that PA, PAA, and PPN are intrinsic conductors, while PP and PPh are semiconductors with energy gaps of 1,4 eV and 0,8 eV, respectively. The comparison with other computational results is presented.

Extended Hückel calculations on functional and structural models of the FeMo-cofactor of nitrogenase

Polyhedron ◽  
2001 ◽  
Vol 20 (1-2) ◽  
pp. 27-36 ◽  
Author(s):  
Frédéric Barrière ◽  
Christopher J Pickett ◽  
Jean Talarmin
Keyword(s):  
Structural Models ◽  
Extended Hückel ◽  
Femo Cofactor ◽  
Extended Hückel Calculations
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