Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Reid, Gillian Hector, Andrew L. Jager, Edward Gurnani, Chitra Levason, William Pugh, David |
| Description | Author Affiliation: Gurnani C ( School of Chemistry, University of Southampton, Southampton SO17 1BJ, UK.) |
| Abstract | Reaction of $SnF_{2}$ in MeOH with the appropriate neutral N- or O-donor ligands produces $[SnF(2,2′-bipy)]_{2}SnF_{6},$ $[SnF(1,10-phen)]_{2}SnF_{4}$ and $[SnF_{2}(L)]$ L = $Me_{3}PO,$ dmso or pyNO). The X-ray structures of $[SnF(2,2′-bipy)]_{2}SnF_{6},$ $[SnF(1,10-phen)]_{2}SnF_{4}$ and $[SnF_{2}(dmso)],$ reveal trigonal pyramidal Sn(II) cores with longer fluorine bridges completing distorted 5- or 6-coordination. Attempts to prepare $SnF_{2}$ adducts with various phosphine or diphosphine ligands in MeCN failed, whilst in $CH_{2}Cl_{2}$ solution complex reactions involving the solvent occurred. The NHC, 1,3-(2,6-di-isopropylphenyl)imidazol-2-ylidene (IDiPP) and $SnF_{2}$ produced the imidazolium salt, $[IDiPPH]SnF_{3},$ the crystal structure of which revealed the first example of a discrete trifluorostannate(II) ion. In contrast, diphosphine complexes of tin( II) chloride formed readily, including $[SnCl_{2}\{Me_{2}P(CH_{2})_{2}PMe_{2}\}],$ $[SnCl_{2}\{o-C_{6}H_{4}(PMe_{2})_{2}\}],$ $[SnCl_{2}\{o-C_{6}H_{4}(PPh_{2})_{2}\}]$ and $[(SnCl_{2})_{2}(μ-Ph_{2}P(CH_{2})_{2}PPh_{2})],$ which were characterised by X-ray crystallography . The structures of $[SnCl_{2}\{Me_{2}P(CH_{2})_{2}PMe_{2}\}]$ and $[SnCl_{2}\{o-C_{6}H_{4}(PMe_{2})_{2}\}]$ reveal chloride-bridged dimers, but $[SnCl_{2}\{o-C_{6}H_{4}(PPh_{2})_{2}\}],$ although also dimeric, has very asymmetric diphosphine coordination best described as $κ^{1}.$ The structures of $[(SnCl_{2})_{2}(μ-Ph_{2}P(CH_{2})_{2}PPh_{2})]$ and of $[SnCl\{o-C_{6}H_{4}(AsMe_{2})_{2}\}]SnCl_{3}$ reveal trigonal pyramidal cores, but with longer Sn⋯Cl bridges affording polymeric structures. The synthesis of $[SnCl_{2}(R_{3}EO)_{2}]$ (R = Ph, E = P or As; and R = Me, E = P) are also reported, along with the structure of $[SnCl_{2}(Me_{3}PO)_{2}],$ which contains distorted tetragonal pyramidal Sn(II) coordination. X-ray structures are also reported for $[(PMe_{3})_{2}CH_{2}][SnCl_{3}]_{2}$ and $[Ph_{2}P(H)(CH_{2})_{2}P(H)Ph_{2}][SnCl_{3}]_{2},$ obtained as by-products from the attempts to synthesise phosphine complexes, as well as $[(o-C_{6}H_{4}(PMe_{2})_{2}CH_{2}]I_{2}.$ All complexes were characterised by microanalysis, IR and multinuclear NMR spectroscopy $(^{1}H,$ $^{19}F\{^{1}H\},$ $^{31}P\{^{1}H$ } and, where solubility allowed, $^{119}Sn).$ Comparisons are drawn with corresponding Sn(IV) and Ge(II) complexes. |
| ISSN | 14779226 |
| Issue Number | 23 |
| Volume Number | 42 |
| e-ISSN | 13645447 |
| Journal | Dalton Trans. |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Publisher Date | 2013-06-21 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Subscribed |
| Subject Keyword | Tin Compounds Chemistry Tin Fluorides Crystallography, X-Ray Ligands Molecular Structure Metabolism Comparative Study Journal Article Research Support, Non-U.S. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Inorganic Chemistry |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|