scholarly journals Structural Studies of Polyesters. IV. Molecular and Crystal Structures of Poly(ethylene succinate) and Poly(ethylene oxalate)

1971 ◽  
Vol 2 (3) ◽  
pp. 387-397 ◽  
Author(s):  
Akio S Ueda ◽  
Yozo Chatani ◽  
Hiroyuki Tadokoro
Keyword(s):  
Crystal Structures ◽  
Structural Studies ◽  
Molecular And Crystal Structures ◽  
Poly Ethylene

Structural studies of poly(phosphazenes). 1. Molecular and crystal structures of poly(dichlorophosphazene)

1987 ◽  
Vol 20 (5) ◽  
pp. 1042-1045 ◽  
Author(s):  
Yozo Chatani ◽  
Koh Yatsuyanagi
Keyword(s):  
Crystal Structures ◽  
Structural Studies ◽  
Molecular And Crystal Structures

scholarly journals Structural Studies of Polyesters. VII. Molecular and Crystal Structures of Racemic Poly(β-ethyl-β-propiolactone)

1974 ◽  
Vol 6 (3) ◽  
pp. 248-255 ◽  
Author(s):  
Mitsuru Yokouchi ◽  
Yozo Chatani ◽  
Hiroyuki Tadokoro ◽  
Hisaya Tani
Keyword(s):  
Crystal Structures ◽  
Structural Studies ◽  
Molecular And Crystal Structures

Structural studies of polyesters: 5. Molecular and crystal structures of optically active and racemic poly (β-hydroxybutyrate)

Polymer ◽  
1973 ◽  
Vol 14 (6) ◽  
pp. 267-272 ◽  
Author(s):  
M Yokouchi ◽  
Y Chatani ◽  
H Tadokoro ◽  
K Teranishi ◽  
H Tani
Keyword(s):  
Crystal Structures ◽  
Optically Active ◽  
Structural Studies ◽  
Molecular And Crystal Structures

Molecular and Crystal Structures of Poly(ethylene oxybenzoate): α Form

1977 ◽  
Vol 10 (2) ◽  
pp. 405-413 ◽  
Author(s):  
Hiroshi Kusanagi ◽  
Hiroyuki Tadokoro ◽  
Yozo Chatani ◽  
Kazuaki Suehiro
Keyword(s):  
Crystal Structures ◽  
Molecular And Crystal Structures ◽  
Poly Ethylene

The Molecular and Crystal Structures of π-Cyclopentadienyl π-Cycloheptatrienyl Vanadium

1963 ◽  
Vol 85 (4) ◽  
pp. 481-482 ◽  
Author(s):  
Gordon. Engebretson ◽  
R. E. Rundle
Keyword(s):  
Crystal Structures ◽  
Molecular And Crystal Structures

Molecular and crystal structures of adducts (Cp2YCl)2L (L = 2THF, DME, 1,4-dioxane)

2007 ◽  
Vol 62 (2) ◽  
pp. 109-111 ◽  
Author(s):  
A. I. Sizov ◽  
T. M. Zvukova ◽  
Z. A. Starikova ◽  
B. M. Bulychev
Keyword(s):  
Crystal Structures ◽  
Molecular And Crystal Structures

Molecular and Crystal Structures of α,α,β-Trimethylfuranylxanthone from Cratoxylum formosum ssp. pruniflorum: A Partial Racemate

2015 ◽  
Vol 606 (1) ◽  
pp. 165-175 ◽  
Author(s):  
Nawong Boonnak ◽  
Suchada Chantrapromma ◽  
Hoong-Kun Fun
Keyword(s):  
Crystal Structures ◽  
Molecular And Crystal Structures

Comparative Structural Studies on Three-Coordinate Copper(I) Halide Complexes With Tertiary Phosphines. Crystal Structures of [(PPh2Mes)CuX]2 and [(PPhMes2)CuX]2 (Mes = Mesityl X = Cl, Br, I)

1992 ◽  
Vol 45 (7) ◽  
pp. 1155 ◽  
Author(s):  
GA Bowmaker ◽  
D Camp ◽  
RD Hart ◽  
PC Healy ◽  
BW Skelton ◽  
...  
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Copper Atom ◽  
Structural Studies ◽  
Coordination Environment ◽  
X Ray ◽  
Tertiary Phosphines ◽  
Structure Determinations ◽  
Halide Complexes ◽  
The Subject

The 1 : 1 complexes of the substituted triphenylphosphine ligands mesityldiphenylphosphine and dimesitylphenylphosphine with copper(1) chloride, bromide and iodide have been the subject of single-crystal X-ray structure determinations at 295 K. All six complexes crystallize as air-stable dimeric molecules, [(PPh2Mes)CuX]2 and [ (PPhMes2)CUX]2 with each copper atom in a distorted trigonal PCuX2. coordination environment. Crystals of [(PPh2Mes)CuCl]2 (1) are monoclinic, P21/n, a 9.961(3), b 18.687(6), c 11.009(7) Ǻ, β 114.63(4)°; R was 0.049 for 2450 'observed' reflections. [(PPh2Mes)CuBrI2 (2) is monoclinic, P21/n, a 9.939(2), b 18.832(6), c 11.238(6) Ǻ, β 115.36(3)°; R was 0.046 for 1803 'observed' reflections. [(PPh2Mes)CuI]2.4/3 C6H6 (3) is rhornbohedral, R3, a 36.877(8), c 9.047(5) A; R was 0.039 for 2537 'observed' reflections. Crystals of [(PPhMes2)CuCl]2.2MeCN (4) are triclinic, Pi, a 15.783(7), b 9.570(4), c 8.914(4) Ǻ, α 72.43(3), β 76.37(3), γ 74.03(3)°; R was 0.045 for 3341 'observed' reflections. [(PPhMes2)CuBr]2.3C6H6 (5) is monoclinic, C2/c, a 9.694(6), b 30.15(2), c 20.66(2) Ǻ, β 98.00(7)°; R was 0.047 for 2117 'observed' reflections. [(PPhMes2)CuI]2.2MeCN (6) is orthorhombic, PP1nb, a 11.694(8), b 14.77(1), c 29.76(3) Ǻ; R was 0.049 for 3447 'observed' reflections. Cu-P bond lengths are: 2.196(2) A (1); 2.198(3) Ǻ (2); 2.222(5) and 2.226(5) Ǻ (3); 2.202(1) Ǻ (4); 2.197(3) A (5); 2.201(4) and 2.264(5) Ǻ (6). The geometries of the LCuX2 and CuX2Cu units are compared with data reported for other monomeric and dimeric compounds for both phosphorus- and nitrogen-based ligands L.

Structural Studies on N-(2,4,6-Trimethylphenyl)-methyl/ chloro-acetamides, 2,4,6-(CH3)3C6H2NH-CO-CH3–yXy (X = CH3 or Cl and y = 0, 1, 2)

2006 ◽  
Vol 61 (10-11) ◽  
pp. 588-594 ◽  
Author(s):  
Basavalinganadoddy Thimme Gowda ◽  
Jozef Kožíšek ◽  
Hartmut Fuess
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structural Data ◽  
The Other ◽  
Side Chain ◽  
Structural Studies ◽  
Asymmetric Unit ◽  
Lattice Constants ◽  
Peptide Linkage ◽  
The Mean

TMPAThe effect of substitutions in the ring and in the side chain on the crystal structure of N- (2,4,6-trimethylphenyl)-methyl/chloro-acetamides of the configuration 2,4,6-(CH3)3C6H2NH-COCH3− yXy (X = CH3 or Cl and y = 0,1, 2) has been studied by determining the crystal structures of N-(2,4,6-trimethylphenyl)-acetamide, 2,4,6-(CH3)3C6H2NH-CO-CH3 (); N-(2,4,6- trimethylphenyl)-2-methylacetamide, 2,4,6-(CH3)3C6H2NH-CO-CH2-CH3 (TMPMA); N-(2,4,6- trimethylphenyl)-2,2-dimethylacetamide, 2,4,6-(CH3)3C6H2NH-CO-CH(CH3)2 (TMPDMA) and N-(2,4,6-trimethylphenyl)-2,2-dichloroacetamide, 2,4,6-(CH3)3C6H2NH-CO-CHCl2 (TMPDCA). The crystallographic system, space group, formula units and lattice constants in Å are: TMPA: monoclinic, Pn, Z = 2, a = 8.142(3), b = 8.469(3), c = 8.223(3), β = 113.61(2)◦; TMPMA: monoclinic, P21/n, Z = 8, a = 9.103(1), b = 15.812(2), c = 16.4787(19), α = 89.974(10)◦, β = 96.951(10)◦, γ =89.967(10)◦; TMPDMA: monoclinic, P21/c, Z = 4, a =4.757(1), b= 24.644(4), c =10.785(2), β = 99.647(17)◦; TMPDCA: triclinic, P¯1, Z = 2, a = 4.652(1), b = 11.006(1), c = 12.369(1), α = 82.521(7)◦, β = 83.09(1)◦, γ = 79.84(1)◦. The results are analyzed along with the structural data of N-phenylacetamide, C6H5NH-CO-CH3; N-(2,4,6-trimethylphenyl)-2-chloroacetamide, 2,4,6-(CH3)3C6H2NH-CO-CH2Cl; N-(2,4,6-trichlorophenyl)-acetamide, 2,4,6-Cl3C6H2NH-COCH3; N-(2,4,6-trichlorophenyl)-2-chloroacetamide, 2,4,6-Cl3C6H2NH-CO-CH2Cl; N-(2,4,6-trichlorophenyl)- 2,2-dichloroacetamide, 2,4,6-Cl3C6H2NH-CO-CHCl2 and N-(2,4,6-trichlorophenyl)- 2,2,2-trichloroacetamide, 2,4,6-Cl3C6H2NH-CO-CCl3. TMPA, TMPMA and TMPDCA have one molecule each in their asymmetric units, while TMPDMA has two molecules in its asymmetric unit. Changes in the mean ring distances are smaller on substitution as the effect has to be transmitted through the peptide linkage. The comparison of the other bond parameters reveal that there are significant changes in them on substitution.

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