A Rapid and Innovative Method for the Easy Prediction of Magnetic Behavior of Homo and Hetero Nuclear Mono and Diatomic Molecules Or Ions without MOT

Please download to get full document.

View again

of 2
10 views
PDF
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Document Description
Prediction of magnetic state is of vital important tool to students of applied chemistry for solving different kinds of problems related to magnetic behavior and also magnetic moment. In this manuscript I try to present an innovative method for the
Document Share
Document Tags
Document Transcript
  INDIAN JOURNAL OF APPLIED RESEARCH X 1    Volume : 3 | Issue : 10 | Oct 2013 | ISSN - 2249-555X ReseaRch PaPeR Chemistry A Rapid and Innovative Method for the EasyPrediction of Magnetic Behavior of Homo andHetero Nuclear Mono and Diatomic Molecules OrIons without Mot Dr. Arijit Das HEAD, Department of Chemistry, Govt. Degree College, Dharmanagar, Tripura,India Keywords Total electrons, bond order, ractional number, positive integer, number o unpairedelectrons  ABSTRACT Prediction o magnetic state is o vital important tool to students o applied chemistry or solving dierent kinds o problems related to magnetic behavior and also magnetic moment. In this manuscript I try to present an innovative method or the identifcation o magnetic behavior o homo and hetero nuclear mono and diatomic molecules or ions having total electrons (01-20) excluding MOT in a very simple and time savings manner. Introduction The conventional method o determination o bond order and magnetic behavior using M.O.T. 1,2,3,4,5 is time consuming.Keeping this in mind, earlier a new innovative method 10 wasintroduced or the determination o bond order o monoand diatomic molecules or ions having total electrons (01-20) rom which we can easily predict the magnetic behavior o dierent kinds o homo and hetero nuclear mono anddiatomic molecules or ions. The present method is theperiodical part o the earlier method 10 , so that student canorecast bond-order including magnetic behavior o monoand diatomic molecules or ions having total electrons (01-20)without M.O.T..Previously eight innovative methods including twelve newormulae have been introduced on ‘Hybridization’, ‘IUPACnomenclature o spiro and bicyclo compounds’, ‘BondOrder o oxide based acid radicals’, ‘Bond order o monoand diatomic molecules or ions having total number o (1-20)e - s’ and ‘spin multiplicity value calculation and predictiono magnetic properties o diatomic hetero nuclear moleculesand ions 6,7,8,9,10 or the beneft o students.New important fndings in case o Magnetic behavior o homo and hetero nuclear mono and diatomic molecules or ions:Beore introducing into innovative method or the predictiono magnetic behavior, frst o all we shepherd the species(molecules and ions) with respect to their total number o electrons and bond order (Table-1). Table -1(Magnetic properties of homo and hetero nuclear monoand diatomic molecules or ions) Molecules or ionsTotalNumber o e - sB.O.MagnetismRemarkson Bond-Order H 2+ 10.5ParamaneticFractionalH 2 , He 22+ 21Diamagnetic+veinteer H 2- ,He 2+ 30.5ParamaneticFractionalHe 2 ,40Diamagnetic+veinteer Li 2+ ,He 2- 50.5ParamaneticFractionalLi 2 , He 22- , Be 22+ 61Diamagnetic+veinteer Be 2+ ,Li 2- 70.5ParamaneticFractionalBe 2 ,Li 22- 80Diamagnetic+veinteer Be 2- ,B 2+ 90.5ParamaneticFractionalB 2 , Be 22- , HF101ParamaneticExceptionB 2- ,C 2+ 111.5ParamaneticFractionalC 2 ,B 22- ,N 22+ , CN + 122Diamagnetic+veinteer C 2- ,N 2+ 132.5ParamaneticFractionalN 2 ,CO,NO + ,C 22- ,CN - ,O 2+ 143Diamagnetic+veinteer N 2- ,NO,O 2+ 152.5ParamaneticFractionalNO - ,O 2 162ParamaneticExceptionO 2- 171.5ParamaneticFractionalF 2 ,O 22- ,HCl181Diamagnetic+veinteer F 2- 190.5ParamaneticFractionalNe 2 200Diamagnetic+veinteer In most o the cases generally it is observed that the specieshaving ractional bond-order will be paramagnetic in natureand the species having positive integer bond-order (i.e. bondorder = 0,1,2,3 etc) will be diamagnetic in nature. But thereis some exception ocused in two cases during predictiono magnetic behavior o species having total number o electrons 10 and 16 respectively. In both the cases althoughthey have positive integer bond-order values, 1 and 2, butthey are paramagnetic in nature instead o diamagnetic. Explanation on Exception behavior: Species having total number o electrons 10 and 16 will beparamagnetic in nature although they have a positive integer bond order value. In this case, frst, we have to predict their magnetic behavior rom their magnetic moment values bycalculating the number o unpaired electrons by the ollowingtwo ormulae based on bond-order.New two ormulae or resolving the number o unpairedelectrons (n) based on bond-order in case o paramagneticsubstances having total number o electrons 10 and 16. When total number of electrons is 10[The number of unpaired electrons (n) = 2 x bond order] Eg: B 2 , HF:- [10 electrons, B.O. = 1.0; n = 2 x bond order =2 x 1.0 = 2.0,Magnetic moment μ s = √n(n+2) B.M. = √2(2+2)B.M. = √8B.M. = 2.83B.M.]  2 X   INDIAN JOURNAL OF APPLIED RESEARCH  Volume : 3 | Issue : 10 | Oct 2013 | ISSN - 2249-555X ReseaRch PaPeR REFERENCE R.L.Dutta, Inorganic Chem., 6th ed. (Part-1), p146-147, (2009) | 2. Lee.J.D., Concise Inorg. Chem, 5th ed.; Wiley India, (2009) | 3. Douglas.B.,Mcdaniel. D. and Alexander.J., Concepts and Models o Inorg.Chem., 3rd | ed.; Wiley India, p157, (2007) | 4. Cotton.F.A.,Wilkinson.G.andGaus.P.L.,Basic Inorg.Chem.,3rd ed.;Wiley India, p107,(2007) | 5. Mahan. B.M. and Meyers.R.J., International Student Edition University Chemistry,4th | ed.(1998) | 6.Das Arijit, ‘Indian Journal o Applied Research’, 03(07), p114, July 2013, ISSN-2249-555X | 7. Das Arijit, ‘Indian Journal o Applied Research’, 03(07), p594, July 2013,ISSN-2249-555X | 8. Das Arijit, ‘Indian Journal o Applied Research’, 03 (07), p596,July 2013, ISSN-2249-555X | 9. Das Arijit, ‘Indian Journal o Applied Research’,03(08), p67,Aug 2013, ISSN-2249-555X | 10. Das Arijit,‘Indian Journal o Applied Research’,03(09), p63,Sept 2013, ISSN-2249-555X | 2. When total number of electrons is 16[The number of unpaired electrons (n) = bond order] Eg: O 2 , NO - etc. :- [16 electrons, B.O. = 2.0; n = bond order = 2, Magnetic Moment using spin only ormula μ s = √n(n+2)B.M. = √2(2+2)B.M. = √8 B.M. = 2.83B.M.] CONCLUSIONS: It is expected that these innovativemethods or the prediction o magnetic properties wouldgo a long way to help to the students o chemistry and alsoapplied chemistry that would choose the subject as their carrier. Experiment in vitro on 100 students show that or determination o B.O., using MOT, strike rate is 1Q/3minand by using these new innovative methods strike rate is1Q/10secs. On the basis o this experiment I can stronglyrecommend to use these new methods or the prediction o magnetic behavior. ACKNOWLEDGEMENT: The author would be grateulsubsequently to Pro. V. Jagannadham, Ph.D., D.Sc., Editor-in-Chie, World Journal o Chemical Education, U.S.A., Dr.R. Sanjeev, Ph.D., Department o Chemistry, Avanthi Degreeand PG College, Hyderabad, India, Pro. R.K.Nath, Ph.D.,Pro. M. K. Singh, Ph.D., Deptt. o Chemistry, Tripura CentralUniversity or their appreciation in this regard. Author wouldbe obliged to Dr. S. Rakshit, Principal, Govt. Degree College,Dharmanagar, Tripura(N), Tripura, India, or giving him thisopportunity to carry out the research work or the beneft o students o UG, Graduate and PG level.
Similar documents
View more...
Search Related
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks