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Editorial 2018

  • Hubert Huppertz and Guido J. Reiss EMAIL logo
Published/Copyright: December 12, 2017

The year 2017 faced a modification in the Editorial office. Julia Eggeling followed Dr. Michaela K. Meyer as Assistant Managing Editor. The De Gruyter publishing house and the members of the present Editorial Board hereby want to express their sincere gratitude for Michaela’s work.

Like the years before, on the cover page of each issue one of the reported structures, which has a special feature or is in one way or another astonishing, is presented. Additionally, beginning with Issue 3/2017 a short descriptive text is now associated. One of the surprises of 2017 was the report on the first crystal structure determination of cp*H (1,2,3,4,5-pentamethylcyclopenta-1,3-diene) [1] 57 years after its synthesis, and after more than 10,000 structurally characterized cp* metal complexes of any kind und application have appeared in the literature [2].

The new format introduced in 2016 has proven its usefulness because it has reduced the share of pure data of each contribution with respect to textual descriptions [3]. The distribution of authors per country was almost the same in the last three years. As expected, countries with a powerful support for open access publications lead the list. As before, contributions are submitted from all over the world (cf. Figure 1).

Fig. 1 Distribution by country.
Fig. 1

Distribution by country.

In 2017 we have noticed that rejections increased significantly. The reasons are complex and multi-faceted, but we would like to take this opportunity to highlight some frequently occurring issues that can be avoided.

  1. For each submitted structure we perform a database search to rule out that the structure has already been published. We would like to encourage our authors to verify this fact independently by a search using the unit cell parameters. Additionally, it is suggested to do a so-called substructure search to identify closely related structures. To avoid unnecessary work, we recommend the use of the CellCheckCSD software distributed by The Cambridge Crystallographic Data Centre [4], which allows a cell search in The Cambridge Structural Database already during the data collection at a very early stage.

  2. A newly occurring issue is that some operators manually remove dozens to hundreds of non-fitting reflections. In most cases, this procedure reduces the R-factors by a few percent, but does not solve a problem during data collection or data reduction. Authors should be prepared that they are asked to re-process the data and do a re-refinement.

  3. Another issue appearing with increasing frequency is the observation that in some structures reported almost all high order reflection are much too large with respect to the derived structural model. The structures that suffer from this problem are identified by very small displacement parameters even at room temperature for some or all non-hydrogen atoms. This is related to large K values, which are again associated with alerts in the CheckCif output [5]. We suggest that this issue is often a consequence of problems during absorption correction procedures.

  4. Nowadays atomic displacement parameters should be refined anisotropically for all non-hydrogen atoms of any small molecule crystal structure. It has been known for decades that data suffering serious problems show non-positive defined atomic displacement parameters. If several atoms are affected, the simple suppression of this effect by hard restraints like the ISOR command of the SHELX system [6] is not sufficient. Also in these cases a reprocessing of the data is strictly necessary after a reason for the underlying problem has been identified.

  5. The chemical correctness is another important feature of each submission. The omission of some hydrogen atoms or the unintended addition of hydrogen atoms directly causes a revision with the task to re-refine the structure with the correct composition. The same is true for the correct assignment of atom types [7]. These re-refinements should always be processed with the newest available software which should be cited using the most recent literature.

  6. According to the general philosophy of the journal, a reviewer keeps in charge during the whole review process. Unfortunately, we had to discover that some authors who were asked to revise the manuscript and/or the structural data simply upload the same data package again. This procedure is pointless, as we do not accept such manuscripts in the course of a second attempt as long as the issues remain unresolved.

References

Benda, C.; Klein, W.; Fässler, T. F.: Crystal structure of 1,2,3,4,5-pentamethyl-1,3-cyclopentadiene, C10H16. Z. Kristallogr. NCS 232 (2017) 511–512.10.1515/ncrs-2016-0402Search in Google Scholar

Groom, C. R.; Bruno, I. J.; Lightfoot, M. P.; Ward, S. C.: The Cambridge Structural Database. Acta Crystallogr. B72 (2016) 171–179.10.1016/B978-0-12-409547-2.02529-4Search in Google Scholar

Huppertz, H.; Reiss, G. J.: Twenty years of structure publication and the road ahead. Z. Kristallogr. NCS 232 (2017) 1–2.10.1515/ncrs-2016-0376Search in Google Scholar

https://www.ccdc.cam.ac.uk/Community/csd-community/cellcheckcsd/Search in Google Scholar

A. Spek, A. L.: Structure validation in chemical crystallography, Acta Crystallogr. D65 (2009) 148–155.10.1107/S090744490804362XSearch in Google Scholar PubMed PubMed Central

Sheldrick, G. M.: Crystal structure refinement with SHELXL. Acta Crystallogr. C71 (2015) 3–8.10.1107/S2053229614024218Search in Google Scholar PubMed PubMed Central

Wandtke, C. M.; Weil, M.; Simpson, J.; Dittrich, B.: Using invariom modelling to distinguish correct and incorrect central atoms in ‘duplicate structures’ with neighbouring 3d elements. Acta Crystallogr. B73 (2017) 794–804.10.1107/S2052520617010745Search in Google Scholar PubMed PubMed Central

Published Online: 2017-12-12
Published in Print: 2018-1-26

©2018 Hubert Huppertz et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Articles in the same Issue

  1. Cover and Frontmatter
  2. Editorial 2018
  3. Crystal structure of dimethanol-bis{3-(((2-oxidonaphthalen-1-yl)methylene)amino)-2-oxo-2H-chromen-4-olato-κ3O,N:O′}dizinc(II), C42H30Zn2N2O10
  4. Crystal structure of aqua-bis{[2,6-dimethyl-N-(pyridin-2-ylmethylene)aniline-κ2N,N′]}zinc(II) triflate monohydrate [ZnC29H31N4O]CF3SO3⋅H2O
  5. Crystal structure of (E)-1-(4-{[(E)-4-Diethylamino-2-hydroxybenzene methylene]amino}phenyl)ethanone methoxy oxime, C20H27ClN3O3
  6. Crystal structure of (E)-1-(4-(((E)-4-(diethylamino)-2-hydroxybenzylidene)amino)phenyl)ethan-1-one oxime, C19H23N3O2
  7. Crystal structure of poly[(μ2-1,4-bis((2-ethyl-1H-benzo[d]imidazol-1-yl)methyl)benzene-κ2N:N′)-(μ2-4,4′-sulfonyldibenzoato-κ2O:O′)zinc(II)], C40H34N4O6SZn
  8. Crystal structure of catena-poly[diaqua(μ3-pyrazine-2,3-dicarboxylato-κ4O,N:O′:O′′)zinc(II)] 1.25 hydrate, C6H8.5N2O7.25Zn
  9. Crystal structure of fac-(acetylacetonato-κ2O,O′)tricarbonyl(tri-m-tolyl phosphane-κP)rhenium(I), C29H28O5PRe
  10. Crystal structure of bis(μ2-methanolato-κ2O:O)-bis(methanol-κ1O)-bis{3-((4-methoxy-2-oxidobenzylidene)amino)-2-oxo-2H-chromen-4-olato-κ3O,O′,N}dichromium(III), C38H36Cr2N2O14
  11. Crystal structure of poly[aqua-(μ3-pyridine-3,5-dicarboxylato-κ5O,O′:O′′,O′′′,N)zinc(II)], C7H7NO6Zn
  12. Crystal structure of bis((1-(((4-(((benzyloxy)imino)methyl)phenyl)imino)methyl)naphthalen-2-yl)oxy-κ2O,N)copper(II), C52H42CuN4O4
  13. Crystal structure of bis{5-(diethylamino)-2-(((2-oxo-2H-chromen-6-yl)imino)methyl)phenolato-κ2O,N}cobalt(II), C40H38CoN4O6
  14. Crystal structure of diaqua-bis(N,N-dimethylformamide-κ1O)-bis{3-((5-chloro-2-oxidobenzylidene)amino)-2-oxo-2H-chromen-4-olato-κ4N,O,O′:O′}dinickel(II), C38H34Ni2Cl2N4O12
  15. Crystal structure of tetrakis(methanol-κO)bis{3-((4-methoxy-2-oxidobenzylidene)amino)-2-oxo-2H-chromen-4-olato-κ3O,N,O′}bicobalt(II), C38H38Co2N2O14
  16. Crystal structure of (S)-tert-butyl-(1-hydroxypropan-2-yl)carbamate, C8H17NO3
  17. Crystal structure of 4-(4′-(pyridin-4-yl)-[1,1′-biphenyl]-4-yl)pyridin-1-ium catena-poly[{5-carboxy-4′-methyl-[1,1′-biphenyl]-3-carboxylato-κ2O,O′}-(μ2-4′-methyl-[1,1′-biphenyl]-3,5-dicarboxylato-κ4O,O′:O′′,O′′′)lead(II)], C52H40N2O9Pb
  18. Crystal structure of catena-poly[diaqua-(μ2-5-methylisophthalato-κ2O:O′)(μ2-1,4-bis((1H-1,2,4-triazol-1-yl)methyl)benzene-κ2N:N′)], NiC21H22O6N6
  19. Crystal structure of the salt tris(guanidinium) tris(tetrapropylammonium) bis(pyridine-2,4,6-tricarboxylate) – water (1/10), C55H126N14O22
  20. Crystal structure of 5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3,7,8-trimethoxy-4H-chromen-4-one, C19H18O8
  21. Crystal structure of poly{[μ2-1,1′-(sulfonylbis(4,1-phenylene))bis(2-methyl-1H-imidazole)-κ2N:N′][μ2-4,4′-oxydibenzoato-κ2O:O′]cobalt(II)} hemihydrate, C34H27N4O7.5SCo
  22. The crystal structure of 25,27-(2,2′-[(2-thioxo-1,3-dithiole-4,5-diyl)disulfanediyl]diethanolate)-26,28-dihydroxycalix[4]arene — dichloromethane (1/1), C36H32Cl2O4S5
  23. The crystal structure of 1,2-bis(3-(pyridin-3-yl)-1,2,4-oxadiazol-5-yl)ethane, C16H12N6O2
  24. Crystal structure of 1-benzyl-3-((4-bromophenyl)amino)-4-(4-methoxyphenyl)-1H-pyrrole-2,5-dione, C24H19BrN2O3
  25. Crystal structure of bis(2-((allylcarbamothioyl)imino)-4-methylthiazol-3-ido-κ2N,S)palladium(II), C16H20N6PdS4
  26. Crystal structure of pyrimidine-2,5-dicarboxylic acid 1.5 hydrate, C12H14N4O11
  27. Crystal structure of trans-diaqua-bis(1H-pyrazole-3-carboxylato-κ2N,O)manganese(II), C8H10N4O6Mn
  28. Crystal structure of catena-(μ3-5-bromoisophthatato-κO,O′: O′′,O′′′′)-(1,2-bis(imidazol-1-yl)ethane-κN:N′)cobalt(II), C16H13CoN4O4Br
  29. Investigation of the compound La5Zn2−xPb1 + x (x = 0.20–0.32)
  30. Crystal structure of (OC-6-13)-diaqua-bis(3,5-di(pyridin-3-yl)-4H-1,2,4-triazol-4-amine-κ1N)-bis(dicyanamido-κ1N)zinc(II) tetrahydrate, ZnC28H32N18O6
  31. Crystal structure of Ga0.62(3)Sb0.38(3)Pd3
  32. Crystal structure of Ga0.47(1)Sb0.53(1)Pd2
  33. A derivative of the Corey lactone – crystal structure of (3aR,4S,5R,6aS)-4-(((tert-butyldimethylsilyl)oxy)methyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl benzoate, C21H30O5Si
  34. A Corey lactone: crystal structure of (3aR,4R,5R,6aS)-5-benzoyloxy-4(hydroxymethyl)hexahydro-2H-cyclopenta[b]furan-2-one, C15H16O5
  35. Hydrothermal synthesis and crystal structure of poly[aqua-(μ2-1,3-bis(4-pyridyl)propane-κ2N:N′)-(μ2-1,4,5,6,7,7-hexachlorobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylato-κ2O:O′)manganese(II) hydrate, C22H20Cl6N2O6Mn
  36. Crystal structure of 2-acetylpyrrole S-methylthiosemicarbazonium hydroiodide, C8H13IN4S
  37. Crystal structure of [N,N-bis((pyrrol-2-yl)ethylidene)butane-1,4-diamine-κ4N,N′,N′′,N′′′]-nickel(II), C16H20N4Ni
  38. Crystal structure of poly[aqua-(μ5-2,5-dicarboxybenzoato-κ5O:O:O′:O′′:O′′′)sodium(I)], C9H7NaO7
  39. Crystal structure of bis(N′-((1H-pyrrol-2-yl)methylene)-1-methylthio-methanethiohydrazido-κ2S,N)nickel(II), C14H16N6NiS4
  40. Crystal structure of 1-(4-((benzo[d][1,3]dioxol-5-yloxy)methyl)phenethyl)-4-(3-chlorophenyl) piperazin-1-ium chloride, C26H28Cl2N2O3
  41. Crystal structure of 2-(4-(2-(4-(2-fluorophenyl)piperazin-1-yl)ethyl)benzyl)benzo[d]isothiazol-3(2H)-one 1,1-dioxide, C26H26FN3O3S – a saccharin dervative
  42. Crystal structure of 3-(2-dimethylaminoethyl)-2,3-dihydro-2-thioxoquinazolin-4(1H)-one, C12H15N3OS
  43. Crystal structure of 3-(3-dimethylaminopropyl)-2,3-dihydro-2-thioxoquinazolin-4(1H)-one, C13H17N3OS
  44. The crystal structure of trans-tetraaqua-bis(p-tolylsulfinato-κO)calcium(II)), C14H22O8S2Ca
  45. The crystal structure of (E)-N′-(pyridin-2-ylmethylene)pyrazine-2-carbohydrazide, C11H9N5O
  46. Crystal structure of (E)-3-(pyren-1-yl)-1-(pyridin-4-yl)prop-2-en-1-one, C24H15NO
  47. Crystal structure of catena-poly[diaqua-(μ2-tartrato-κ4O,O′:O′′,O′′′)cobalt(II)], C4H8CoO8
  48. Crystal structure of 4-chloro-2-methyl-6-(4-(trifluoromethoxy)phenyl)pyrimidine, C12H8ClF3N2O
  49. Crystal structure of 1-(4-fluorophenyl)-N-(5-((triphenylstannyl)thio)thiophen-2-yl)methanimine, C27H20FN3S2Sn
  50. Crystal structure of methyl (Z)-2-(5-fluoro-2-oxoindolin-3-ylidene)hydrazine-1-carbodithioate, C10H8FN3OS2
  51. Crystal structure of tert-butyl (Z)-4-(2-(5-methoxy-3-(2-((methylthio)carbonothioyl)hydrazono)-2-oxoindolin-1-yl)ethyl)piperazine-1-carboxylate, C22H31N5O4S2
  52. The crystal structure of (E)-2-((2-(o-tolylcarbamothioyl)hydrazono)methyl)benzoic acid, C16H15N3O2S
  53. Crystal structure of 2-chloro-1,3-di-tert-pentyl-4,4-diphenyl-1,3,2λ3,4-diazaphosphasiletidine, C22H32ClN2PSi
  54. Crystal structure of tetramethyl 5,5′-(buta-1,3-diyne-1,4-diyl)diisophthalate, C24H18O8
  55. Crystal structural of 2-amino-4-(4-methoxyphenyl)-3-cyano-7,7-dimethyl-5-oxo-4H-5,6,7,8-tetrahydrobenzo[b]pyran, C19H20N2O3
  56. Crystal structure of 1,3,5-tris((trimethylsilyl)methyl)-1,3,5-triazinane-2,4,6-trione, C15H33N3O3Si3
  57. The crystal structure of bis(2-benzoyl-5-hydroxylphenolato-κ2O,O′)copper(II), C26H18CuO6
  58. Crystal structure of 2,6-bis(3-(pyrazin-2-yl)-1H-1,2,4-triazol-5-yl)pyridine – 1-ethyl-3-methyl-1H-imidazol-3-ium bromide (1/1), C23H22N13Br
  59. The crystal structure of (E)-N-benzyl-N′-benzylidene-4-methylbenzenesulfonohydrazide, C21H20N2O2S
  60. Crystal structure of ethyl (E)-5-((2-(3-hydroxybenzoyl)hydrazono)methyl)-3,4-dimethyl-1H-pyrrole-2-carboxylate – water – ethanol (1/1/1), C19H27N3O6
  61. The crystal structure of (E)-4-(3-ethoxy-2-hydroxybenzylideneamino)benzoic acid, C16H15NO4
  62. Crystal structure of (μ2-N,N′-bis((pyridin-4-yl)methyl)ethanediamide-κ2N:N′)-tetrakis(diethylcarbamodithioato-κ2S,S′)dizinc(II), C34H54N8O2S8Zn2
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