Please wait, while we are loading the content...
| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Oakes, John |
| Copyright Year | 1973 |
| Abstract | N.m.r. chemical shifts and relaxation times have been measured for hydroxylic protons in a series of dilute alcohol + water mixtures at different temperatures. The shifts are largely influenced by hydrogen bonding between alcohol and water molecules, resulting in low field shifts in dilute alcohol solutions. Hydrocarbon groups also shift the hydroxylic proton resonance, but to high fields. This effect is relatively small, particularly for small and spherical alkyl groups like t-butyl, but increases with chain length of the alkyl group. Water molecules have restricted motion in dilute alcohol + water mixtures. One of the main effects in restricting the molecular mobility of water molecules, for the short alkyl chain alcohols studied, particularly methanol and isopropyl alcohol, is hydrogen bonding interactions between alcohol hydroxyl groups and water molecules. Water molecules surrounding alkyl chains also have restricted motion and the effect increases with alcohol chain length. Contrary to some current theories, alcohol–water hydrogen bonding is important in these mixtures and should be taken into account in the interpretation of relevant thermodynamic data. |
| Starting Page | 1311 |
| Ending Page | 1320 |
| Page Count | 10 |
| File Format | |
| ISSN | 03009238 |
| Volume Number | 69 |
| Journal | Journal of the Chemical Society, Faraday Transactions 2 |
| DOI | 10.1039/F29736901311 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Isopropyl alcohol Hydroxy group Alkyl Nuclear magnetic resonance Hydrogen bond Methanol |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Physical and Theoretical 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...
|