The category Computer Program Abstracts provides a rapid means of communicating up-to-date information concerning both new programs or systems and signi®cant updates to existing ones. Following normal submission, a Computer Program Abstract will be reviewed by one or two members of the IUCr Commission on Crystallographic Computing. It should not exceed 500 words in length and should follow the standard format given on page 189 of the June 1985 issue of the Journal [J. Appl. Cryst. (1985). 18, 189± 190] and on the World Wide Web at http://www.iucr. org/journals/jac/software/. Lists of software presented and/or reviewed in the Journal of Applied Crystallography are available on the World Wide Web at the above address, together with information about the availability of the software where this is known.

WinGX suite for small-molecule single-crystal crystallography

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

The WinGX suite provides a complete set of programs for the treatment of small-molecule single-crystal diffraction data, from data reduction and processing, structure solution, model refinement and visualization, and metric analysis of molecular geometry and crystal packing, to final report preparation in the form of a CIF. It includes several well known pieces of software and provides a repository for programs when the original authors no longer wish to, or are unable to, maintain them. It also provides menu items to execute external software, such as the SIR and SHELX suites of programs. The program ORTEP for Windows provides a graphical user interface (GUI) for the classic ORTEP program, which is the original software for the illustration of anisotropic displacement ellipsoids. The GUI code provides input capabilities for a wide variety of file formats, and extra functionality such as geometry calculations and ray-traced outputs. The programs WinGX and ORTEP for Windows have been distributed over the internet for about 15 years, and this article describes some of the more modern features of the programs.

/pdf/wingx-and-ortep-for-windows-an-update-2x46kgdygv.pdf

WinGX and ORTEP for Windows: an update

J. Appl. Cryst.の発刊に際して

https://pubs.rsc.org/en/content/articlepdf/2019/NP/C8NP00092A

Marine natural products.

CHEMISTRY OF THE UNSATURATED CLUSTER COMPOUND DECACARBONYL(TRICYCLOHEXYLPHOSPHINE)BIS(μ‐HYDRIDO)TRIOSMIUMPLATINUM: X‐RAY CRYSTAL STRUCTURES OF (OS3PT(μ‐H)2(CO)11(P(CYCLO‐C6H11)3)), (OS3PT(μ‐H)4(CO)10(P(CYCLO‐C6H11)3)), AND (OS3PT(μ‐H)2(μ‐CH2)(CO)10(P(CYCLO‐C6H11)3)) (TWO ISOMERS)

Synthesis and Coordination Chemistry of the Sterically Demanding Pendant-Arm Macrocycle N,N′,N′′-Tris((2R)-2-hydroxy-3-methylbutyl)-1,4, 7-triazacyclononane.

Heteronuclear Transition Metal-Alkyne Clusters. Part 1. Reactions of Tris(alkyne)monocarbonyltungsten Complexes with Octacarbonyldicobalt. Synthesis, X-Ray Crystal Structure, and Two-Dimensional NMR Studies of (WCo2(μ-C2Et2)(μ-C4Et4)(

Synthetic Studies on the Pederin Family of Antitumor Agents. Syntheses of Mycalamide B (XIII), Theopederin D (XVI) and Pederin (XVIII).

A 1,3-dithiane displaces tosylate by a 5-exo-tet cyclisation to give a bicyclic sulfonium salt. Nucleophilic attack on this 4-thia-7a-thioniaperhydroindene by azide ions kinetically favours opening to give a nine-membered ring α-azidosulfide, but 2-(3′-azidopropyl)-1,3-dithiane is the thermodynamic product from B3LYP/6-31G** calculations. A similar sulfonium salt generated from 2-(3′-hydroxypropyl)-1,3-dithiane with thionyl chloride rearranges to 2-(3′-chloropropyl)-1,3-dithiane. Azide ion displacement of the primary alkyl chloride is then faster than [1.4] sulfanyl participation from the thioacetal. An α-chlorosulfide derived from diphenyldithioacetal does not rearrange but undergoes direct displacement to give an α-azidosulfide.

Louis J. Farrugia

Papers

Synthesis and Coordination Chemistry of the Sterically Demanding Pendant-Arm Macrocycle N,N′,N′′-Tris((2R)-2-hydroxy-3-methylbutyl)-1,4, 7-triazacyclononane.

Heteronuclear Transition Metal-Alkyne Clusters. Part 1. Reactions of Tris(alkyne)monocarbonyltungsten Complexes with Octacarbonyldicobalt. Synthesis, X-Ray Crystal Structure, and Two-Dimensional NMR Studies of (WCo2(μ-C2Et2)(μ-C4Et4)(

Synthetic Studies on the Pederin Family of Antitumor Agents. Syntheses of Mycalamide B (XIII), Theopederin D (XVI) and Pederin (XVIII).

Controlling Neighbouring Group Participation from Thioacetals.