Crystallographic studies have been carried out on four complexes of the type, [MoO(μ-NAr)(S2CNR2)]2 (R = Et, Pr; Ar = Ph, p-tol). Each contains a binuclear molybdenum(V) centre bridged by two imido ligands, with each molybdenum atom also carrying terminal dithiocarbamate and oxo moieties. Syn and anti structural types are seen which result in significant differences within the Mo2N2 core; that in the anti structures being planar, while fold angles of 151.1° and 164.6° are observed in the syn complexes.

Chemischer InformationsdienstVolume 6, Issue 32 Organoelement Compounds ChemInform Abstract: CRYSTAL AND MOLECULAR STRUCTURE OF DI-MU-SULFIDO-BIS((L-HISTIDINATO)OXOMOLYBDENUM(V)) SESQUIHYDRATE BRUCE SPIVACK, BRUCE SPIVACKSearch for more papers by this authorZVI DORI, ZVI DORISearch for more papers by this author BRUCE SPIVACK, BRUCE SPIVACKSearch for more papers by this authorZVI DORI, ZVI DORISearch for more papers by this author First published: August 12, 1975 https://doi.org/10.1002/chin.197532346AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume6, Issue32August 12, 1975 RelatedInformation

This paper deals with the biological properties of 14 coordination complexes assembled from a large panel of thiosemicarbazone ligands and [Mo2O2S2]2+ cluster. The investigation of biological properties evidences a high cancer inhibition activity, and antimicrobial, antifungal and antioxidant properties. The complexes based on phenolic ligands are the most active towards tumor cells, while the pyridine derivatives are the most efficient against bacteria and fungi.

The crystal and molecular structures of the sulphur-bridged complexes Cs2 [Mo2S2O2EDTA].2H2O (I) and [Mo2S2O2(L-histidine)2].112 H2O (II) are described. Complex (I) crystallises in the orthorhombic space group Pnam with cell dimensions a = 12.385(3), b = 7.108(3), c = 24.537(3) Å, Z = 4. Full matrix least-squares refinement led to a final discrepancy factor of R = 0.059. Complex (II) crystallises in the tetragonal space group P41212 with cell dimensions a = b = 10.549(4), c = 36.510(14) Å, Z = 8. Full matrix least-squares refinement led to a final discrepancy index of R =0.05. The MoMo distances of 2.799(1) and 2.848(1) Å for (I) and (II) are indicative of metal-metal bonding, thus explaining the diamagnetism of these complexes. The molybdenum atoms are displaced from the bonding plane defined by the bridging sulphur atoms and those atoms trans to them by 0.37 Å for (I) and 0.33, 0.28 Å for (II). Consideration of these effects along with the obtuse angles found for the axial ligands suggests that the coordination geometry around each molybdenum atom is best described as a distorted, capped octahedron.

The sulphur-bridged ion, Mo2S2O22+, which has been separated from the parent compound, Na2Mo2O2S2-(cysteine)2, is stable towards acids and does not dissociate to a paramagnetic monomeric species, as does its oxo-bridged analogue, Mo2O42+, even in very concentrated acidic solutions.

The crystal and molecular structure of the title compound was determined by Patterson and Fourier methods from X-ray diffraction data collected by counter methods. Crystals are orthorhombic, space group Pnam, with Z= 4 in a unit cell of dimensions: a= 12·385(3), b= 7·108(3), c= 24·537(3)Å. Full-matrix least-squares refinement of 2196 reflections gave R 0·059. The hexadentate ethylenediaminetetra-acetate (edta) ligand co-ordinates to each molybdenum atom through two carboxylato-oxygens and a nitrogen while two bridging sulphur atoms and a terminal oxygen complete the co-ordination sphere around each molybdenum. The short Mo–Mo bond [2·799(1)Å] suggests that the co-ordination geometry around each metal atom may be described as a distorted capped octahedron sharing a common edge determined by the two sulphur atoms. The molecule possesses a mirror plane, passing through the two sulphur atoms, which necessitates disorder in the ethylenic carbon atoms of the bridging edta ligand.

Chemischer Informationsdienst. Organische ChemieVolume 2, Issue 50 Preparative Organic Chemistry ChemInform Abstract: KRISTALLSTRUKTUR VON DI-MY-SULFIDO-BIS-(OXO-(L-HISTIDINATO)-MOLYBDAEN(V))-HYDRAT BRUCE SPIVACK, BRUCE SPIVACKSearch for more papers by this authorARTHUR P. GAUGHAN, ARTHUR P. GAUGHANSearch for more papers by this authorZVI DORI, ZVI DORISearch for more papers by this author BRUCE SPIVACK, BRUCE SPIVACKSearch for more papers by this authorARTHUR P. GAUGHAN, ARTHUR P. GAUGHANSearch for more papers by this authorZVI DORI, ZVI DORISearch for more papers by this author First published: December 14, 1971 https://doi.org/10.1002/chin.197150086AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume2, Issue50December 14, 1971 RelatedInformation

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of di-.mu.-sulfido-bis[oxo(L-histidinato)molybdenum(V)] hydrateBruce Spivack, Arthur P. Gaughan, and Zvi DoriCite this: J. Am. Chem. Soc. 1971, 93, 20, 5265–5266Publication Date (Print):October 1, 1971Publication History Published online1 May 2002Published inissue 1 October 1971https://pubs.acs.org/doi/10.1021/ja00749a055https://doi.org/10.1021/ja00749a055research-articleACS PublicationsRequest reuse permissionsArticle Views53Altmetric-Citations24LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

B. Spivack and Z. Dori, J. Chem. Soc. D, 1970, 1716 DOI: 10.1039/C29700001716