Stereoisomeric complexes of Pt(II) with threonine and allothreonine

Stereoisomeric Pt(IV) complexes with threonine

“…A similar difference has been noted for the diastereomers of platinum com plexes with other amino acids[10].…”

“…As with Pt(II) complexes[10], the signals for the Pt(IV) trans bischelate complexes trans [Pt(Thr)2 Cl 2 ] are shifted downfield compared to the signals for the cis isomers. The signals for the Pt(IV) complexes with monodentate coordination of the ligands (in [Pt(ThrH) 2 Cl 4 ], the Pt atom is coordination by two N atoms and four Cl atoms) are shifted upfield bỹ 900 ppm compared to the signals for the complexes with bidentate coordination of threonine (in [Pt(Thr) 2 Cl 2 ], the Pt atom is coordination by two N atoms, two Cl atoms, and two O atoms).…”

“…The complexes Pt(S ThrH) 2 Cl 4 and cis [Pt(S Thr) 2 Cl 2 ] were additionally characterized by X ray diffraction. EXPERIMENTAL Diastereomeric Pt(II) bischelate complexes with threonine prepared as described in [10] were used as starting materials.…”

Structural, electronic and vibrational properties of L-asparagine

“…Amino acids are molecules that have been widely studied in recent years because they are the main components of proteins [1][2][3][4][5][6]. The presence of H-acceptor and H-donor centers such as carboxyl and amino groups in their structures is important in the secondary structure of proteins and in the process of aggregation in various solutions [3][4][5][6].…”

Effect of external electric field on ground and singlet excited states of phenylalanine: A theoretical study

“…Being the principal constituent, amino acids occupy the centre stage of protein research over decades [1][2][3][4][5][6]. Among the naturally occurring amino acids; phenylalanine (Phe), tryptophan (Trp) and tyrosine (Try) possess fluorescent aromatic chromophores.…”