Nitrogen-14 nuclear magnetic resonance study of some diamagnetic covalent metal nitrates

Chew, Kathryn; Healy, Michael A.; Khalil, M. H.; Logan, Norman; Derbyshire, W.

doi:10.1039/dt9750001315

Cited by 21 publications

(9 citation statements)

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“…The ClO 4and PF 6anions have been considered as common "noncoordinating" anions. 39 They have relatively little tendency to serve as ligands in the present structures. Such noncoordinating anions afford the spacer-abundant species, that is 3:4 adducts.…”

Section: Discussionmentioning

confidence: 94%

Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X^- = NO₃^-, BF₄^-, ClO₄^-, PF₆^-, CF₃CO₂^-, and CF₃SO₃^-)

et al. 2003

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Studies on the subtle effects and roles of polyatomic anions in the self-assembly of a series of AgX complexes with 2,4'-Py(2)S (X(-) = NO(3)(-), BF(4)(-), ClO(4)(-), PF(6)(-), CF(3)CO(2)(-), and CF(3)SO(3)(-); 2,4'-Py(2)S = 2,4'-thiobis(pyridine)) have been carried out. The formation of products appears to be primarily associated with a suitable combination of the skewed conformers of 2,4'-Py(2)S and a variety of coordination geometries of Ag(I) ions. The molecular construction via self-assembly is delicately dependent upon the nature of the anions. Coordinating anions afford the 1:1 adducts [Ag(2,4'-Py(2)S)X] (X(-) = NO(3)(-) and CF(3)CO(2)(-)), whereas noncoordinating anions form the 3:4 adducts [Ag(3)(2,4'-Py(2)S)(4)]X(3) (X(-) = ClO(4)(-) and PF(6)(-)). Each structure seems to be constructed by competition between pi-pi interactions of 2,4'-Py(2)S spacers vs Ag.X interactions. For ClO(4)(-) and PF(6)(-), an anion-free network consisting of linear Ag(I) and trigonal Ag(I) in a 1:2 ratio has been obtained whereas, for the coordinating anions NO(3)(-) and CF(3)CO(2)(-), an anion-bridged helix sheet and an anion-bridged cyclic dimer chain, respectively, have been assembled. For a moderately coordinating anion, CF(3)SO(3)(-), the 3:4 adduct [Ag(3)(2,4'-Py(2)S)(4)](CF(3)SO(3))(3) has been obtained similarly to the noncoordinating anions, but its structure is a double strand via both face-to-face (pi-pi) stackings and Ag.Ag interactions, in contrast to the noncoordinating anions. The anion exchanges of [Ag(3)(2,4'-Py(2)S)(4)]X(3) (X(-) = BF(4)(-), ClO(4)(-), and PF(6)(-)) with BF(4)(-), ClO(4)(-), and PF(6)(-) in aqueous media indicate that a [BF(4)(-)] analogue is isostructural with [Ag(3)(2,4'-Py(2)S)(4)]X(3) (X(-) = ClO(4)(-) and PF(6)(-)). Furthermore, the anion exchangeability for the noncoordinating anion compounds and the X-ray data for the coordinating anion compounds establish the coordinating order to be NO(3)(-) > CF(3)CO(2)(-) > CF(3)SO(3)(-) > PF(6)(-) > ClO(4)(-) > BF(4)(-).

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Section: Discussionmentioning

confidence: 94%

Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X^- = NO₃^-, BF₄^-, ClO₄^-, PF₆^-, CF₃CO₂^-, and CF₃SO₃^-)

et al. 2003

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“…The bite size of each anion plays a crucial role in the tuning of the interaction. The Ag−Ag distance of 3 (3.67(1) Å) is considered to be an anion-free normal interaction since the PF 6 - is a noncoordinating anion. In the case of 4 , the long biting and coordinating CF 3 SO 3 - preferably stretches the Ag−Ag interaction.…”

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confidence: 99%

Tunable Transannular Silver−Silver Interaction in Molecular Rectangles

Jung

Kim

Lee

et al. 2003

Crystal Growth & Design

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Slow diffusion of AgX with O(SiMe 2 (4-Py)) 2 (L) yields unique molecular rectangles consisting of [Ag(L)] 2 X 2 (X -) NO 3 -, ClO 4 -, PF 6 -, and CF 3 SO 3 -). For the rectangular system, the transannular argentophilic (Ag-Ag) interaction competes with the interaction between Ag(I) and its anions, while the π-π interactions are constantly preserved. The strength of the argentophilic interaction is in the following order: NO 3 -> ClO 4 -> PF 6 -> CF 3 SO 3and is reversibly stretched via the anion exchange from 3.20(1) to 3.81(1) Å without the destruction of the cyclic skeleton.

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“…As depicted in Figure 2, the intramolecular π ··· π interactions (3.40(4) Å; 4.0(4)°, 3.42(4) Å; 4.0(4)°) exist in order to stabilize the 1‐D coordination polymeric skeleton. The hexafluorophosphate anion also acts as a simple counteranion (the shortest distance of Ag∙∙∙F = 5.202(6) Å) 46 …”

Section: Resultsmentioning

confidence: 99%

Acetonitrile coordination to silver(I) ions of 1‐D coordination polymers with 1,3‐di(nicotinoyloxy)‐2‐methylenepropane

Noh

2022

Bulletin Korean Chem Soc

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The fluorescent molecule 1,3-di(nicotinoyloxy)-2-methylenepropane (L) can be a good candidate for construction of coordination polymers with photoluminescence (PL) properties. Self-assembly of silver(I) hexafluorophosphate with this ligand in a mixture of methanol and dichloromethane produced a 1-D helical coordination polymer consisting of [Ag(L)](PF 6 ), whereas crystallization from an acetonitrile-based medium afforded a 1-D sinusoidal coordination polymer consisting of [Ag(L)(CH 3 CN) 2 ](PF 6 ) having intramolecular argentophilic AgÁÁÁAg and πÁÁÁπ interactions arising from the eclipsed conformation of L. These findings suggest that the final structures of the two products can be controlled by the reaction solvent media rather than the crystallization method or concentration. The physicochemical properties of the present silver(I) compounds were fully characterized by means of infrared spectroscopy, thermogravimetric analysis/differential scanning calorimetry, PL, single-crystal x-ray diffraction (XRD), and powder-XRD measurements.

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Nitrogen-14 nuclear magnetic resonance study of some diamagnetic covalent metal nitrates

Cited by 21 publications

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Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X^- = NO₃^-, BF₄^-, ClO₄^-, PF₆^-, CF₃CO₂^-, and CF₃SO₃^-)

Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X^- = NO₃^-, BF₄^-, ClO₄^-, PF₆^-, CF₃CO₂^-, and CF₃SO₃^-)

Tunable Transannular Silver−Silver Interaction in Molecular Rectangles

Acetonitrile coordination to silver(I) ions of 1‐D coordination polymers with 1,3‐di(nicotinoyloxy)‐2‐methylenepropane

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Nitrogen-14 nuclear magnetic resonance study of some diamagnetic covalent metal nitrates

Cited by 21 publications

References 0 publications

Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X- = NO3-, BF4-, ClO4-, PF6-, CF3CO2-, and CF3SO3-)

Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X- = NO3-, BF4-, ClO4-, PF6-, CF3CO2-, and CF3SO3-)

Tunable Transannular Silver−Silver Interaction in Molecular Rectangles

Acetonitrile coordination to silver(I) ions of 1‐D coordination polymers with 1,3‐di(nicotinoyloxy)‐2‐methylenepropane

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Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X^- = NO₃^-, BF₄^-, ClO₄^-, PF₆^-, CF₃CO₂^-, and CF₃SO₃^-)

Subtle Role of Polyatomic Anions in Molecular Construction: Structures and Properties of AgX Bearing 2,4‘-Thiobis(pyridine) (X^- = NO₃^-, BF₄^-, ClO₄^-, PF₆^-, CF₃CO₂^-, and CF₃SO₃^-)