Dimorphic Intra- and Intermolecular Aryl Motifs in Symmetrical Hexafaceted Molecules (ArnX)3Y-Z-Y(XArn)3

Scudder, Marcia L.; Dance, Ian G.

doi:10.1002/1521-3765(20021202)8:23<5456::aid-chem5456>3.0.co;2-l

Cited by 31 publications

(28 citation statements)

References 13 publications

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“…Such CH-p interaction between phenyl ring and sugar units was reported. 7,8, 16 The bond lengths and angles around the nickel centres and those in the imidazolylidene rings in complexes 1 and 2 are consistent with those found in a "non-sugar" NHC complex, trans-[NiBr 2 (ICy) 2 ] (ICy = 1,3-dicyclohexylimidazol-2-ylidene) 15c (Table 1). The dihedral angles between the two imidazolylidene rings are 23.9( 2 2.2974(9) 2.3154(6) 2.3257(7) C 2-Im -N 1.353(6) 1.359(4) 1.359(5) 1.347(4) 1.351(6) 1.355(4) 1.349(5) 1.353(4) 1.378(6) 1.364(5) 1.354(6) 1.348(6) 1.348(5) 1.344(5) C 4-Im -N 1.389(6) 1.397(4) 1.392(5) 1.394(5) 1.378(6) 1.382(5) 1.392(5) C 5 111.0(4) 110.9(4)…”

Section: Structures Of Complexes In the Solid Statesupporting

confidence: 73%

Dynamic behaviour attributed to chiral carbohydrate substituents of N-heterocyclic carbene ligands in square planar nickel complexes

et al. 2011

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Nickel complexes having acetylated glucopyranosyl group incorporated N-heterocyclic carbene (NHC) ligands with methyl or benzyl groups as an N-substituent exhibit two kinds of dynamic behaviours in solution (1)H NMR spectroscopy. One of the dynamic behaviours is attributed to the anti- and syn-rotamers, which occur by the rotation of the unsymmetrical NHC ligands around the axes of the Ni-C bonds. The other is attributed to the diastereomers of the syn-rotamers, which occur by opposite rotation of the imidazolylidene rings and the chiral carbohydrate group incorporated into the NHC ligands. Crystallographic analysis of the nickel complex having the NHC ligand with acetylated glucopyranosyl and benzyl groups as N-substituents showed CH-π interaction between the glucopyranosyl unit of each NHC ligand and the phenyl ring of the other NHC ligand in the complex in the solid state.

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Section: Structures Of Complexes In the Solid Statesupporting

confidence: 73%

Dynamic behaviour attributed to chiral carbohydrate substituents of N-heterocyclic carbene ligands in square planar nickel complexes

et al. 2011

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“…Thus, the planar arrays of 1 can be viewed as continuous networks of the (OFF)(EF) 2 embrace motifs. 9 The intermolecular distances between the pairs of pyridine rings involved in the OFF interactions range from 3.6(3) to 4.2(5) A ˚.…”

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confidence: 99%

A two-dimensional clathrate hydrate sandwiched by planar arrays of a copper complex

et al. 2005

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“…In every molecule of [CuF(tptm)], two of the pyridine rings are involved in a offset-face-to-face (OFF) and an edge-to-face (EF) intermolecular interaction, while the third pyridine ring is involved in two edge-to-face intermolecular interactions. Thus, the planar arrays of [CuF(tptm)] can be viewed as continuous networks of the (OFF)(EF) 2 embrace motifs (Scudder and Dance 2002).…”

Section: (B) As the Coordinated H 2 O And Oh Moieties (See The Red Spmentioning

confidence: 99%

Mimicking the photosynthetic system with strong hydrogen bonds to promote proton electron concerted reactions

et al. 2007

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A Copper(2+) complex with a Cu(II)-C bond containing sp(3) configuration was used to investigate the role of strong hydrogen bonds in proton coupled electron transfer (PCET) reactions. The only example of a Cu(II)-C system realized so far is that using tris-(pyridylthio)methyl (tptm) as a tetradentate tripodal ligand. Using this ligand, [CuF(tptm)] and [Cu(tptm)(OH)] have been prepared. The former complex forms supra-molecular arrays of layers of the complex between which hydroquinone is intercalated in the crystalline phase. This hydroquinone intercalation crystal was prepared via the photochemical conversion of quinone during the crystallization process. This conversion reaction probably involves a proton coupled electron transfer process. The nuclear magnetic resonance spectroscopic analysis of the reaction mixture shows the presence of Cu(III) during the conversion reaction. These results strongly suggest the presence of the molecular aggregate of the [CuF(tptm)] complex, water and quinone in the solution phase during the quinone to hydroquinone conversion. The presence of this type of aggregate requires a strong hydrogen bond between the [CuF(tptm)] complex and water. The presence of this particular hydrogen bond is a unique character of such a complex that has the Cu(II)-C bond. This complex is used as a model for photosynthetic water splitting since the photoconversion of quinone to hydroquinone also involves the production of oxygen from water.

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Dimorphic Intra- and Intermolecular Aryl Motifs in Symmetrical Hexafaceted Molecules (ArnX)3Y-Z-Y(XArn)3

Cited by 31 publications

References 13 publications

Dynamic behaviour attributed to chiral carbohydrate substituents of N-heterocyclic carbene ligands in square planar nickel complexes

Dynamic behaviour attributed to chiral carbohydrate substituents of N-heterocyclic carbene ligands in square planar nickel complexes

A two-dimensional clathrate hydrate sandwiched by planar arrays of a copper complex

Mimicking the photosynthetic system with strong hydrogen bonds to promote proton electron concerted reactions

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