forthcoming articles

The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section C: Structural Chemistry.

See also Forthcoming articles in all IUCr journals.

Accepted 25 April 2016

Purine 3′:5′-cyclic nucleotides with the nucleobase in a syn orientation: cAMP, cGMP and cIMP

Five crystals of purine 3′:5′-cyclic nucleotides, viz. cAMP·2H2O, cAMP·0.3H2O, cGMP·5H2O, Na(cGMP)·4H2O and Na(cIMP)·4H2O, have been characterized in terms of the nucleobase synanti conformation, ribose and O/P/O/C/C/C ring puckering, inter-nucleotide inter­actions and nucleotide–Na inter­actions. The synanti preference of various purine nucleotides is analysed statistically based on data from the Cambridge Structural Database.

Accepted 22 April 2016

Nitrile coordination to rhodium does not lead to C—H activation

Tris(pyrazol­yl)borate complexes of rhodium are well known to activate C—H bonds. The reactive [Tp′Rh(PMe3)] fragment [Tp′ is tris­(3,5-di­methyl­pyrazol-1-yl)hydro­borate] is found to react with valero­nitrile to give a κ1N-bound complex. In contrast to the widespread evidence for the reaction of this fragment with C—H bonds via oxidative addition, no evidence for such a complex is observed.

Accepted 20 April 2016

The silver(I) complex [HB{3-(CF3),5-(CH3)Pz}3]AgNCCH3 supported by a partially fluorinated scorpionate ligand

The silver(I) adduct [HB{3-(CF3),5-(CH3)Pz}3]AgNCCH3 was obtained by treating [HB{3-(CF3),5-(CH3)Pz}3]Na with CF3SO3Ag in the presence of aceto­nitrile, and was isolated in 85% yield. Single-crystal X-ray diffraction analysis reveals that the AgI center has a pseudo-tetra­hedral all-nitro­gen coordination sphere and is supported by a tris­(pyrazol­yl)borate ligand that binds to the AgI center in a κ3-fashion.

Accepted 11 March 2016

An iron(II) complex tripodally chelated with 1,1,1-tris­(pyridin-2-yl)ethane showing room-temperature spin-crossover behaviour

In the novel iron(II) complex salt tetra­phenyl­phospho­nium tris­(thio­cyanato)[1,1,1-tris­(pyridin-2-yl)ethane]­ferrate(II), the Fe—N bond lengths indicate that the specimen consists of comparable molar fractions of the low- and high-spin species at 296 K. A magnetic study confirmed that spin-crossover takes place around 290 K.

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