Molybdenum(VI) Peroxo α-Amino Acid Complexes:  Synthesis, Spectra, and Properties of MoO(O2)2(α-aa)(H2O) for α-aa = Glycine, Alanine, Proline, Valine, Leucine, Serine, Asparagine, Glutamine, and Glutamic Acid. X-ray Crystal Structures of the Glycine, Alanine, and Proline Compounds

AbstractSorption of an acidic, amphoteric, sulphur containing and basic α-amino-acid (glutamic acid, glycine, methionine and lysine) by copper montmorillonite was studied by chemical and X-ray methods. With glutamic acid complex formation occurs only in solution but increasing basicity of the aminoacid favours complex formation in the clay interlayers.

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X-ray studies on crystalline complexes involving amino acids and peptides. XL. Conformational variability, recurring and new features of aggregation, and effect of chirality in the malonic acid complexes of DL- and L-arginine

Acta Crystallographica Section B Structural Science ◽

10.1107/s0108768102018827 ◽

2002 ◽

Vol 58 (6) ◽

pp. 1051-1056 ◽

Cited By ~ 7

Author(s):

N. T. Saraswathi ◽

M. Vijayan

Keyword(s):

Amino Acids ◽

Hydrogen Bonding ◽

Amino Acid ◽

Crystal Structures ◽

Malonic Acid ◽

Conformational Flexibility ◽

X Ray ◽

Conformational Variability ◽

Aggregation Pattern ◽

Positively Charged

The crystal structures of the complexes of malonic acid with DL- and L-arginine, which contain positively charged argininium ions and negatively charged semimalonate ions, further demonstrate the conformational flexibility of amino acids. A larger proportion of folded conformations than would be expected on the basis of steric consideration appears to occur in arginine, presumably because of the requirements of hydrogen bonding. The aggregation pattern in the DL-arginine complex bears varying degrees of resemblance to patterns observed in other similar structures. An antiparallel hydrogen-bonded dimeric arrangement of arginine, and to a lesser extent lysine, is a recurring motif. Similarities also exist among the structures in the interactions with this motif and its assembly into larger features of aggregation. However, the aggregation pattern observed in the L-arginine complex differs from any observed so far, which demonstrates that all the general patterns of amino-acid aggregation have not yet been elucidated. The two complexes represent cases where the reversal of the chirality of half the amino-acid molecules leads to a fundamentally different aggregation pattern.

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Condensation Reactions of Cobalt Amino Acid Complexes with Formaldehyde: Preparation and Crystal Structures of Cobalt Complexes Containing New Hexadentate, Pendant-Arm Macrocyclic and Acyclic Ligands

Inorganic Chemistry ◽

10.1021/ic970482o ◽

1997 ◽

Vol 36 (24) ◽

pp. 5470-5477 ◽

Cited By ~ 6

Author(s):

Penelope J. Brothers ◽

George R. Clark ◽

Helen R. Palmer ◽

David C. Ware

Keyword(s):

Amino Acid ◽

Crystal Structures ◽

Cobalt Complexes ◽

Amino Acid Complexes ◽

Condensation Reactions ◽

Pendant Arm ◽

Acyclic Ligands

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Structural Scaffold of 18-Crown-6 Tetracarboxylic Acid for Optical Resolution of Chiral Amino Acid: X-Ray Crystal Analyses of Complexes of D- and L-Isomers of Serine and Glutamic Acid

Chemical and Pharmaceutical Bulletin ◽

10.1248/cpb.54.452 ◽

2006 ◽

Vol 54 (4) ◽

pp. 452-457 ◽

Cited By ~ 13

Author(s):

Hiroomi Nagata ◽

Hiroyuki Nishi ◽

Miyoko Kamigauchi ◽

Toshimasa Ishida

Keyword(s):

Amino Acid ◽

Glutamic Acid ◽

Optical Resolution ◽

Tetracarboxylic Acid ◽

X Ray

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Crystal structures of N6-modified-amino acid related nucleobase analogs (II): hybrid adenine-β-alanine and adenine-GABA molecules

New Journal of Chemistry ◽

10.1039/c9nj02279a ◽

2019 ◽

Vol 43 (24) ◽

pp. 9680-9688 ◽

Cited By ~ 10

Author(s):

Angel García-Raso ◽

Angel Terrón ◽

Adela López-Zafra ◽

Andrés García-Viada ◽

Agostina Barta ◽

...

Keyword(s):

Amino Acid ◽

Dft Calculations ◽

Crystal Structures ◽

X Ray ◽

Π Interactions ◽

X Ray Crystallography

H-Bonding networks and anion–π interactions in the crystal structures of N6-modified-amino acid adenine analogs are investigated using X-ray crystallography and DFT calculations.

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