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Journal logoIUCrDATA
ISSN: 2414-3146

August 2021 issue

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Cover illustration: A new triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetra­fluorido­borate counter-anion, (4-benzyl-1-methyl-1,2,4-triazol-5-yl­idene)[(1,2,5,6-η)-cyclo­octa-1,5-diene](tri­phenyl­phosphane-κP)iridium(I), [Ir(C10H11N3)(C8H12)(C18H15P)]BF4, has been synthesized and structurally characterized. The cationic complex exhibits a distorted square-planar environment around the IrI ion. One significant non-standard hydrogen-bonding inter­action exists between a hydrogen atom on the N-heterocyclic carbene ligand and a fluorine atom from the counter-ion, BF4. In the crystal, π–π stacking inter­actions are observed between one of the phenyl rings and the triazole ring. Both inter­molecular and intra­molecular C—H⋯π(ring) inter­actions are also observed. See: Newman, Astashkin, Albert & Rajaseelan [IUCrData (2021). 6, x210836].

metal-organic compounds

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The crystal structure of cis-[MoO2(acac)2] has been redetermined at 100 K, providing a more precise description of the structure including hydrogen atoms and inter­molecular contacts.

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The RhI atom in the title compound has a distorted square-planar coordination environment, defined by a bidentate cyclo­octa-1,5-diene (COD) ligand, an N-heterocyclic carbene and a chloride ligand with bromide substitutional disorder.

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The title compound consists of 1-butyl-3-methyl­imidazolium cations, tri­bromido­(tri­phenyl­phophine)nickelate(II) anions and co-crystallized 1-butanol solvent mol­ecules.

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The cationic complex in the title salt, [Ir(C8H12)(C18H15P)(C10H11N3)]BF4, exhibits a distorted square-planar geometry around the IrI ion.

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The title compound is a xenophilic transition-metal cluster with short iron–manganese bonds of 2.6274 (10) and 2.6294 (10) Å. The complex forms a polymeric (two-dimensional) structure through isocarbonyl linkages between the sodium cations and the Fe(CO)4 fragments of the cluster.

organic compounds

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The title compound, C19H28N22+·2Cl·0.5H2O, was prepared by the reaction of 4-tert-butyl­pyridine with di­chloro­methane. One of the chloride anions is clamped between the aromatic rings via anion–π inter­actions.
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