Zigzag-shaped supramolecular networks formed via hydrogen bonding. Crystal structures, DNA binding, and cytotoxic activity of a new palladium(II) complex

Gao, Enjun; Yin, H. X.; Zhang, W. Z.; Wang, K. H.; Gu, Xiao-Fu; Zhu, Mingchang; Wu, Qiong; Liu, L.; Sun, Ya‐Guang

doi:10.1134/s1070328408070075

Cited by 8 publications

(1 citation statement)

References 28 publications

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“…[24][25] This class of hydrogen-bonding interactions plays an important role in assembling the small molecules into complicated supramolecular networks. [26][27][28] In the phase A and B, there are similar O-H…O hydrogen bonds, and they afford obvious control on the resulting different dipolymer in phases A and B, respectively, on the basis of different orientations of the molecules. Figure 3 trans formation from phase A to B (i.e., from the disordered to ordered polymorph).…”

Section: Ccdc Reference 844248 844249mentioning

confidence: 99%

Hydrothermal Synthesis and Crystal Structure of Two Polymorphs of (3-nitro-4-bromophenyl)Acetic Acid

Gao

2011

Journal of Chemical Research

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Two polymorphs of (3-nitro-4-bromophenyl)acetic acid, were prepared as single crystals through hydro-thermal reaction and were structurally characterised using single-crystal X-ray diffraction. Both polymorphs crystallise in the monoclinic space group P2 1 /c, but their cell parameters are obviously different. Hydrogen-bonding interactions has a crucial role in assembling two small molecules into dipolymer in the two polymorphs. The arrangements of the dipolymers in phase A and B are remarkably different for the molecular orientation and interatomic distances according to their strong hydrogen bonds and π…π stacking interactions.

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Section: Ccdc Reference 844248 844249mentioning

confidence: 99%

Hydrothermal Synthesis and Crystal Structure of Two Polymorphs of (3-nitro-4-bromophenyl)Acetic Acid

Gao

2011

Journal of Chemical Research

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Structure Ligation Relationship of Amino Acids for the Selective Indole C−H Arylation Reaction: L‐Aspartic acid as Sustainable Alternative of Phosphine Ligands

et al. 2020

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The Structure Ligation Relationship (SLR) of free amino acids (AAs) under Pd‐catalysis were examined for the chemo‐ and regio‐selective indole C−H arylation reactions. While the majority of AAs were minor or ineffective, the L‐aspartic acid (L‐Asp) stands out promising to deliver high‐value C3‐arylated indoles with excellent chemo‐ (C vs N) and regioselectivity (C3 vs C2) with high functional group tolerance. Thus, the protocol offers a cost‐effective and sustainable alternative of phosphine‐based ligands for the indole C3−H arylation reactions. Preliminary mechanistic investigations suggested the simultaneous involvement of −NH2, α‐CO2H, and β‐CO2H functionalities of L‐Asp and found critical for its ligation efficiency. The developed catalytic system was compatible with the tandem decarboxylation/arylation procedure for the chemoselective synthesis of 3‐aryl indoles.magnified image

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Compounds of Amino Acids as Anions

Fleck

Petrosyan

2014

Salts of Amino Acids

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This chapter deals with salts formed from metal cations and amino acid anions. All amino acids can act as monovalent anion; the acidic members glutamic acid and aspartic acid as well as cysteine and tyrosine can form both monovalent and divalent anions. Due to the large number of available cations, a multitude of combinations is possible and in fact found (for the standard twenty amino acids, over 150 crystal structures are published, and many more species have been characterized by other methods). Different hydration states (as reported for the pristine amino acid crystals) occur as well, and the existence of polymorphs is also documented for some cases. The formation of metal-amino acid complexes has been studied in several works (both for a given amino acid and a given cation), and the flexibility of amino acid molecules as ligands allows coordination of cations with different chemical properties (such as charge or ionic radius). Several coordination modes are found for amino acids -the molecules can act as monodentate, bidentate, tridentate, and bridging ligands. The connectivity of the coordination polyhedra of the metal cations is considered -isolated units are frequent, but chains and layers occur as well. Moreover, these units can connect via amino acid molecules to form higher-dimensional structures. Hydrogen bonds (also involving water molecules, both in coordination or in the interstices as crystal water) further stabilize the units, forming relatively stable phases. The frequency of salts varies among the different amino acids, and most examples are reported for glycinate salts, whereas crystals of cations and basic and weakly soluble amino acids are difficult to obtain (e.g., arginate and lysinate salts have not been reported in crystalline state). Finally, the aspect of symmetry is considered (the chirality of most amino acids playing a crucial role), and, consequently, the properties of these salts have impact on applications in the fields of physics, biology, and medicine.

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Zigzag-shaped supramolecular networks formed via hydrogen bonding. Crystal structures, DNA binding, and cytotoxic activity of a new palladium(II) complex

Cited by 8 publications

References 28 publications

Hydrothermal Synthesis and Crystal Structure of Two Polymorphs of (3-nitro-4-bromophenyl)Acetic Acid

Hydrothermal Synthesis and Crystal Structure of Two Polymorphs of (3-nitro-4-bromophenyl)Acetic Acid

Structure Ligation Relationship of Amino Acids for the Selective Indole C−H Arylation Reaction: L‐Aspartic acid as Sustainable Alternative of Phosphine Ligands

Compounds of Amino Acids as Anions

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