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Roy S, Drew MGB, Bauzá A, Frontera A, Chattopadhyay S. Estimation of conventional C-Hπ (arene), unconventional C-Hπ (chelate) and C-Hπ (thiocyanate) interactions in hetero-nuclear nickel(ii)-cadmium(ii) complexes with a compartmental Schiff base. Dalton Trans 2018; 46:5384-5397. [PMID: 28386619 DOI: 10.1039/c6dt04906k] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Three new heteronuclear nickel(ii)/cadmium(ii) complexes, [(SCN)(Cl)Cd(L)Ni(DMF)2] (1), [(SCN)(CH3CO2)Cd(L)Ni(CH3OH)2] (2) and [(SCN)(Cl)Cd(L)Ni(NH2CH2CH2CH2NH2)]n (3) {where H2L = N,N'-bis(3-ethoxy-salicylidene)propane-1,3-diamine is a N2O4 compartmental Schiff base}, have been synthesized and characterized. The structures of the complexes have been confirmed by single crystal X-ray diffraction studies. In each complex, nickel(ii) is placed in the inner N2O2 environment and cadmium(ii) is placed in the outer O4 compartment of the compartmental Schiff base. Furthermore, the importance of unconventional C-Hπ (chelate) interactions in the solid state of both complexes and C-Hπ (thiocyanate) interaction in complex 2 has been described by means of DFT and MEP calculations and characterized using NCI plots. All complexes show photoluminescence at room temperature upon irradiation by ultraviolet light. The lifetimes of excited states are in the range of 2-6 ns.
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77
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Frontera A, Bauzá A. Concurrent aerogen bonding and lone pair/anion-π interactions in the stability of organoxenon derivatives: a combined CSD and ab initio study. Phys Chem Chem Phys 2018; 19:30063-30068. [PMID: 29095452 DOI: 10.1039/c7cp06685f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In this manuscript the ability of organoxenon fluorides to establish concurrent π-hole aerogen bonding and lone pair/anion-π interactions has been studied at the RI-MP2/def2-TZVP level of theory. The presence of both an aromatic system (benzene, trifluorobenzene and pentafluorobenzene) and a xenon atom makes these molecules suitable for simultaneously establishing both interactions. In this regard, we have used CH3CN, NH3, O(CH3)2, Cl-, CN- and BF4- as neutral and charged electron donors, respectively. Moreover, the NBO analysis showed that orbital effects contribute to the global stabilization of the complexes studied. Furthermore, we have used Bader's theory of "atoms in molecules" to analyse and characterize the noncovalent interactions described herein from a charge-density perspective. Finally, several examples retrieved from the CSD are also included, highlighting the impact of these interactions in the solid state chemistry of Xe.
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78
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Roy S, Bhattacharyya A, Purkait S, Bauzá A, Frontera A, Chattopadhyay S. A combined experimental and computational study on supramolecular assemblies in hetero-tetranuclear nickel(ii)-cadmium(ii) complexes with N 2O 4-donor compartmental Schiff bases. Dalton Trans 2018; 45:15048-15059. [PMID: 27722334 DOI: 10.1039/c6dt02587k] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Two new hetero-tetranuclear nickel(ii)/cadmium(ii) complexes, a cubane [(CH3CO2)2Ni2(L1)2Cd2(NCS)2] (1) and a linear tetramer [(DMSO)2NiL2Cd(NCS)(μ1,3-SCN)Ni(DMSO)L2Cd(NCS)2] (2) {where H2L1 = N,N'-bis(3-methoxysalicylidene)propane-1,3-diamine and H2L2 = N,N'-bis(3-ethoxysalicylidene)propane-1,3-diamine are potential octadentate compartmental Schiff bases}, were synthesized and characterized. The structures of both complexes were confirmed by single crystal X-ray diffraction studies. Complex 1 contained a Ni2Cd2O4 cubane core, whereas complex 2 featured an end-to-end thiocyanate-bridged tetranuclear moiety. Furthermore, complex 1 showed C-HH-C interactions, whereas a unique Sπ interaction was observed in complex 2. Theoretical studies were performed using several computational tools such as NBO and AIM analyses. Both complexes showed photoluminescence in DMSO medium at room temperature upon irradiation with ultraviolet light. The lifetimes of the excited states were ∼27 ns.
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79
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Seth SK, Bauzá A, Frontera A. Screening polymorphism in a Ni(ii) metal–organic framework: experimental observations, Hirshfeld surface analyses and DFT studies. CrystEngComm 2018. [DOI: 10.1039/c7ce01991b] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A new polymorphic form of diaquaiminodiacetatonickel(ii) is structurally characterized by a detailed analysis of Hirshfeld surface and further analysed by DFT and QTAIM calculations.
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80
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Prohens R, Portell A, Font-Bardia M, Bauzá A, Frontera A. H-Bonded anion–anion complex trapped in a squaramido-based receptor. Chem Commun (Camb) 2018; 54:1841-1844. [DOI: 10.1039/c7cc09241e] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report the experimental observation (X-ray characterization) of an anion–anion complex (anion = hydrogen fumarate) stabilized by H-bonds that is trapped in a secondary squaramide receptor.
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81
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Naseer MM, Bauzá A, Alnasr H, Jurkschat K, Frontera A. Lone pair–π vs. σ-hole–π interactions in bromine head-containing oxacalix[2]arene[2]triazines. CrystEngComm 2018. [DOI: 10.1039/c8ce00666k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New bromine head-containing oxacalix[2]arene[2]triazines were synthesized. Owing to the bromine head and complementary V-shaped cavity, the solid state structure showed an intriguing and unique 1D-supramolecular chain-like self-assembly.
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82
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Seth SK, Bauzá A, Frontera A. Bipolar behaviour of salt-bridges: a combined theoretical and crystallographic study. NEW J CHEM 2018. [DOI: 10.1039/c8nj02194e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
In this manuscript, we study the bipolar behaviour of salt-bridges by combining theoretical calculations with an X-ray crystallographic study of succinate and aminopyridinium salts.
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83
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Hussain M, Bauzá A, Frontera A, Lo KM, Naseer MM. Structure guided or structure guiding? Mixed carbon/hydrogen bonding in a bis-Schiff base of N-allyl isatin. CrystEngComm 2018. [DOI: 10.1039/c7ce01697b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A supramolecular motif listed as ‘carbon bonded’ or ‘hydrogen bonded’ may have the character of both. We highlight the hybrid character of the non-covalent interaction in a bis-Schiff base of N-allyl isatin by combining theory and experiment.
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84
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Sarkar N, Drew MGB, Harms K, Bauzá A, Frontera A, Chattopadhyay S. Methylene spacer regulated variation in conformation of tetradentate N2O2 donor Schiff bases trapped in manganese(iii) complexes. CrystEngComm 2018. [DOI: 10.1039/c7ce02019h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The paper attempts to explain the distortion from planarity of tetradentate Schiff bases in octahedral manganese(iii) complexes.
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85
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Dutta S, Jana S, Mahapatra P, Bauzá A, Frontera A, Ghosh A. Joining of trinuclear (CuL)2M (M = MnII and CdII) nodes by 1,3- and 1,4-benzenedicarboxylate linkers: positional isomeric effect on co-crystallization. CrystEngComm 2018. [DOI: 10.1039/c8ce01168k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Among the four one-dimensional coordination polymers obtained by joining (CuL)2M (M = MnII and CdII) nodes with 1,3- and 1,4-benzenedicarboxylate linkers, the chains derived from 1,3-benzenedicarboxylate are co-crystallized with dimeric CuII units.
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86
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Roy S, Drew MGB, Bauzá A, Frontera A, Chattopadhyay S. Non-covalent tetrel bonding interactions in hemidirectional lead(ii) complexes with nickel(ii)-salen type metalloligands. NEW J CHEM 2018. [DOI: 10.1039/c7nj05148d] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tetrel bonding interactions have been investigated in hetero-dinuclear nickel(ii)/lead(ii) complexes using MEP and DFT calculations.
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87
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Naskar B, Bauzá A, Frontera A, Maiti DK, Das Mukhopadhyay C, Goswami S. A versatile chemosensor for the detection of Al3+ and picric acid (PA) in aqueous solution. Dalton Trans 2018; 47:15907-15916. [DOI: 10.1039/c8dt02289e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The selective detection of Al3+ and picric acid in water has been realized by means of a fluorescence spectroscopy-based chemosensor.
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88
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Mahmoudi G, Zaręba JK, Bauzá A, Kubicki M, Bartyzel A, Keramidas AD, Butusov L, Mirosław B, Frontera A. Recurrent supramolecular motifs in discrete complexes and coordination polymers based on mercury halides: prevalence of chelate ring stacking and substituent effects. CrystEngComm 2018. [DOI: 10.1039/c7ce02166f] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We report the synthesis, X-ray characterization and DFT study of five Hg(ii) complexes with Schiff bases containing a nicotinohydrazide core to explore the formation of chelate-ring π-stacking interactions.
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89
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Ghosh K, Harms K, Bauzá A, Frontera A, Chattopadhyay S. σ-Hole halogen bonding interactions in a mixed valence cobalt(iii/ii) complex and anti-electrostatic hydrogen bonding interaction in a cobalt(iii) complex: a theoretical insight. CrystEngComm 2018. [DOI: 10.1039/c8ce01323c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Supramolecular interactions in the solid state structures of a mixed valence cobalt(ii/iii) complex and a cobalt(iii) complex have been studied using DFT calculations.
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90
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Ghosh K, Banerjee A, Bauzá A, Frontera A, Chattopadhyay S. One pot synthesis of two cobalt(iii) Schiff base complexes with chelating pyridyltetrazolate and exploration of their bio-relevant catalytic activities. RSC Adv 2018; 8:28216-28237. [PMID: 35542722 PMCID: PMC9084250 DOI: 10.1039/c8ra03035a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/16/2018] [Indexed: 11/22/2022] Open
Abstract
Two new cobalt(iii) tetrazolato complexes [Co(L1)(PTZ)(N3)] (1) and [Co(L2)(PTZ)(N3)] (2) {where H2L1 = 2((3-(methylamino)propylimino)methyl)-6-methoxyphenol, H2L2 = 2((3-(dimethylamino)propylimino)methyl)-6-ethoxyphenol and HPTZ = 5-(2-pyridyl)tetrazole}, have been synthesized via in situ 1,3-dipolar cycloaddition reaction of 2-cyanopyridine and sodium azide in the presence of cobalt(ii) nitrate hexahydrate and respective Schiff bases in the open atmosphere. The structures of both complexes have been confirmed by single crystal X-ray diffraction studies. Features of noncovalent interactions in the solid state of both complexes have been studied by means of DFT and MEP calculations and characterized using Bader's theory of “atoms in molecules” (AIM). These complexes act as biomimetic catalysts promoting the aerobic oxidation of 3,5-di-tert-butylcatechol (3,5-DTBC) to the corresponding o-benzoquinone at room temperature. The reaction follows Michaelis–Menten enzymatic reaction kinetics with turnover numbers of ∼0.030 s−1 in an acetonitrile–methanol (2 : 1) mixture. Both complexes are also reactive towards aerobic oxidation of o-aminophenol in acetonitrile–methanol (2 : 1) with turnover numbers ∼0.095 s−1. Two cobalt(iii) tetrazolato complexes have been synthesized and characterized. Noncovalent interactions have been analysed by DFT and MEP calculations and characterized using Bader's theory of AIM. Both complexes catalyze the aerial oxidation of 3,5-DTBC and OAPH.![]()
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91
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Ghosh K, Harms K, Bauzá A, Frontera A, Chattopadhyay S. Heteronuclear cobalt(iii)/sodium complexes with salen type compartmental Schiff base ligands: methylene spacer regulated variation in nuclearity. Dalton Trans 2018; 47:331-347. [DOI: 10.1039/c7dt03929h] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Three unique heteronuclear cobalt(iii)/sodium Schiff base complexes have been synthesized and characterized. Nuclearity of these complexes changes as a result of alteration of the steric hindrance in the ligand moiety.
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92
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Maity T, Mandal H, Bauzá A, Samanta BC, Frontera A, Seth SK. Quantifying conventional C–H⋯π(aryl) and unconventional C–H⋯π(chelate) interactions in dinuclear Cu(ii) complexes: experimental observations, Hirshfeld surface and theoretical DFT study. NEW J CHEM 2018. [DOI: 10.1039/c8nj00747k] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Conventional C–H⋯π(aryl) and unconventional C–H⋯π(chelate) interactions are explored in detail.
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93
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Purkait S, Chakraborty P, Frontera A, Bauzá A, Zangrando E, Das D. Zinc(ii) complexes with uncommon aminal and hemiaminal ether derivatives: synthesis, structure, phosphatase activity and theoretical rationalization of ligand and complex formation. NEW J CHEM 2018. [DOI: 10.1039/c8nj01853g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc(ii)-mediated and anion-controlled unusual Aminal and Hemiaminal Ether Derivative complex formations verified experimentally and rationalized by DFT calculations.
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94
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Prohens R, Portell A, Vallcorba O, Font-Bardia M, Bauzá A, Frontera A. Polymorphism in secondary squaramides: on the importance of π-interactions involving the four membered ring. CrystEngComm 2018. [DOI: 10.1039/c7ce01945a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the crystal structures of four new squaric acid derivatives, i.e. three polymorphs of 3,4-bis((2-(dimethylamino)ethyl)amino)cyclobut-3-ene-1,2-dione (1a–c) and a cocrystal with resorcinol. A DFT study has been also carried out to investigate the supramolecular assemblies.
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95
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Ghorai P, Brandão P, Bauzá A, Frontera A, Saha A. Anion-reliant structural versatility of novel cadmium(II) complexes: Synthesis, crystal structures, photoluminescence properties and exploration of unusual O···S chalcogen bonding involving thiocyanate coligand. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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96
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Llorente N, Fernández-Pérez H, Bauzá A, Frontera A, Vidal-Ferran A. Ni-Catalysed Intramolecular [4+4]-cycloadditions of bis-dienes towards eight-membered fused bicyclic systems: a combined experimental and computational study. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00684a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel(0) complexes derived from electron-rich triarylphosphines as efficient catalysts for intramolecular [4+4]-cycloadditions of an array of structurally diverse bis-dienes.
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97
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Barbas R, Prohens R, Font-Bardia M, Bauzá A, Frontera A. Hydrogen bonding versus π-interactions: their key competition in sildenafil solvates. CrystEngComm 2018. [DOI: 10.1039/c8ce00567b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report the X-ray characterization of four sildenafil solvates where the conformation of the pyrazolo[3,4-d]pyrimidine and phenyl rings depends on the solvent.
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98
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García-Raso A, Terrón A, Bauzá A, Frontera A, Molina JJ, Vázquez-López EM, Fiol JJ. Crystal structures of N6-modified-aminoacid/peptide nucleobase analogs: hybrid adenine–glycine and adenine–glycylglycine molecules. NEW J CHEM 2018. [DOI: 10.1039/c8nj02147c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Anion–π interactions in crystal structures of N6-modified-aminoacid and dipeptide adenine analogs are investigated using X-ray crystallography and DFT calculations.
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99
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Seth SK, Bauzá A, Mahmoudi G, Stilinović V, López-Torres E, Zaragoza G, Keramidas AD, Frontera A. On the importance of Pb⋯X (X = O, N, S, Br) tetrel bonding interactions in a series of tetra- and hexa-coordinated Pb(ii) compounds. CrystEngComm 2018. [DOI: 10.1039/c8ce00919h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We study Pb⋯X (X = N, S, Br) tetrel bonding interactions in a series of tetra- and hexa-coordinated Pb(ii) compounds that exhibit hemidirectional coordination.
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100
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Bag R, Sikdar Y, Sahu S, Maiti DK, Frontera A, Bauzá A, Drew MGB, Goswami S. A versatile quinoxaline derivative serves as a colorimetric sensor for strongly acidic pH. Dalton Trans 2018; 47:17077-17085. [DOI: 10.1039/c8dt02449a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A strongly acidic colorimetric pH sensor induced by the acidity of [Fe(H2O)6]3+, and single crystal to single crystal transformation between the protonated and deprotonated form.
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