Stability of diboron(B2) and dilithium(Li2). If you are having trouble with Chemistry, Organic, Physics, Calculus, or Statistics, we got your back! Your question makes no sense: "Hence Li2+ must be unstable than Li2 but then why Li2 is more stable than Li2+" says the same thing twice. B.O of B2 is also 1. so for stability order u need to see the no of electrons in antibonding orbitals. Hence, $\ce{Li2^2+}$ must be less stable than $\ce{Li2}$ due to half bond character. The meaning of this is decorating. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Chemistry Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Want to improve this question? Answer to Draw a molecular orbital energy diagram for Li2. Li2+ is more stable than Li2− because Li2− has more numbers of antibonding electrons. According to J.D Lee, compounds with fraction bond number are unstable. Be2 is stable and paramagnetic, but Li2 is unstable. Do you mean bond strength? Question = Is AsH3 polar or nonpolar ? But we can consider some more details: i m trying to ask why li2+ is more stable than li2? The comment asks "Why is Li2+ more stable than Li2". Break point chlorination: It may be defined as the chlorination of water to such an extent that not only living organism but also other organic impurities in water are destroyed. Share on Facebook Tweet on Twitter Plus on Google+. Explain. How can I write a bigoted narrator while making it clear he is wrong? 3- H 2 is the most stable because it has the highest bond order (1), in comparison with the bond orders (1/2) of H 2 + and H 2-. Create your account in less than a minutes. C2-substituted (with methyl, isopropyl or phenyl groups) imidazolium salts, 3-ethyl-1,2-dimethyl imidazolium bromine ([EDMIm][Br]), 3-ethyl-2-isopropyl-1-methylimidazolium bromine ([EIMIm][Br]), and 3-ethyl-1-methyl-2-phenyl- imidazolium bromine … Magnesium might be a similar exception, however, since both Li and Mg have small radii; it might be interesting to compare stabilities of Mg2 and Mg2+. asked by Mahnoor on November 19, 2014; Chemistry. If number of electrons more in antibonding orbital the molecule become unstable. What is the fundamental difference between an AI model and a function? The energy cost to make one mole of Li gas is 37 kcal (CRC Handbook). Download Free solutions of NCERT chemistry Class 11th from SaralStudy. 4- Theoretically it would not be possible to form a molecule from two hydrides because the anti-bonding and bonding orbitals would cancel each other out. WITH THE HELP OF A GRAPH, STATE THE DEVIATION OF MOLAR CONDUCTIVITY OF STRONG AGAINST WEEK ELECTROLYTE. Ion-ion interaction potential in Kohn-Sham DFT, SF short story about body-hopping alien hunted by cop. 5So li2 is more stable among 3,Now in li2- and li2+ we have to check antibonding electron,, less antibonding more stability. Further stable with respect to what? According to MO theory, why is the dilithium cation more stable than the dilithium anion? 1/2 ; less. Each horizontal line represents one orbital that can hold two electrons. Forgot password? Are geminal disubstituted alkenes more stable than their cis/trans isomers? It is stable. Explain. how can I recover my password now! Li2 only has 2 electrons. Sodium alkyl sulphates - Oils and Fats These types of detergents are sodium salts of sulphuric acid esters of long chain aliphatic alcohols consisting of generally 10 to 15 car. Break point chlorination, Break point chlorination: It may be defined as t... Actinide, what are ionization energy of actinides? The heat of formation of Li+ in water is 66 kcal/mol (presumably from aquation with 4 waters); the hydration bonding is worth about (124 + 37 + 66)/4 = 54 kcal/mole each. In middle a. In my knowledge, based on inorganic text books, you can explain the stability of a molecule using molecular orbital theory (MOT). We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, … So, the bond order is zero. The Lisunov Li-2 (NATO reporting name: Cab), originally designated PS-84, was a license-built Soviet-version of the Douglas DC-3.It was produced by Factory #84 in Moscow-Khimki and, after evacuation in 1941, at TAPO in Tashkent.The project was directed by aeronautical engineer Boris Pavlovich Lisunov Well, as the first point it is to be noted that an atom forms a molecule in order to get stabilised. I didn't see that the person deleted it. How is a vacant House seat filled in Louisiana? Li 2− < Li 2+ < Li 2. Newer Post Older Post Home. Bond Order=2(bonding electrons)−0(anti−bonding e−)2=1. so order will be H2 > Li2 >B2. Why is it so? By Bagus Amin - 6:03 PM - Share this. Already have an account? Use Z<8 to draw the MO diagram for Li2, you should get the same answer and bond order. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. what is the stability order of Li2, H2, B2B.O of Li2 is 1B.O of H2 is 1 B.O of B2 is also 1so for stability order u need to see the no of electrons in antibonding orbitalsmore the no of those electrons less will b da stabilityso order will be H2 > Li2 >B2, Natural gas, which we can assume is 100% methane, is combusted to generate electricity at a power plant. I also suggest you think more carefully about the tags you use for your question, organic-chemistry, periodic-table and electronegativity are all totally irrelevant. Be2 is stable and diamagnetic, bit Li2 is unstable. If the ferric ion is more stable than the ferrous ion, then why is it readily reduced to the latter? Is the molecule likely to be stable? Why is cis-1,2-dichloroethene more stable than trans-1,2-dichloroethene? B.O of Li2 is 1. Dashed lines show which of the atomic orbitals combine to form the molecular orbitals. I calculated that the bond order of $\ce{Li2^2+}$ is 0.5 while that of $\ce{Li2}$ is 1. Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! SaralStudy helps in prepare for NCERT CBSE solutions for Class 11th chemistry. What are you trying to ask? The deposition of solid Li2S from liquid Li2S4 contributes to three-quarters of the total theoretical capacity and is therefore of great significance over the entire cathode reaction. Here we get B O ( L i X 2) = 1, B O ( L i X 2 X +) = 0.5, and B O ( L i X 2 X −) = 0.5. Someone commented a question about my answer and deleted after a while. Is AsH3 polar or nonpolar ? one less electron goes In pi1, reduces bond order, therefore stability of bindings. more the no of those electrons less will b da stability. The sulfur redox in Li–S batteries involves a complex sequence of solid–liquid–solid conversions, and reaction catalysis has recently become a focused area for further advancement. The valence molecular orbital diagram for Li2- is shown. In the periodic table, there are 18 groups i.e. Popular Posts. Hence li2+ contain 2 antibonding, li2- contains 3 antibonding. THe molecular orbital bond order for this species is equal to _____ and Li2- is _____ stable than Li2-1/2-less. Beautifying or enhancing complexion of skin. Use the following MO diagram for Be2, Be2+, and Be2-. Explain why the relative energy levels diagrams for Li2, Be2, B2, C2, N2 are different The molecular orbital theory of Li2 to F2 gives a graphical explanation. Paramagnetic or Diamagnetic. The Li 2 S/Li 2 Se‐protected Li metal (denoted as LSSe@Li) exhibits a stable dendrite‐free cycling behavior over 900 h with a high lithium stripping/plating capacity of 3 mAh cm −2 at 1.5 mA cm −2 in the symmetrical cell. Li2 is known in the gas phase. Why is dipositive dilithium more stable than neutral dilithium? O 2 + is more stable than O 2-.Because According to molecular orbital theory O 2 + has 15 electrons &it has one electron in antibonding orbital. Hence li2+>li2-So finally Li2>li2+ >li2- The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. The important point is that the unusually small size of the Li+ ion makes it able to polarize a neutral atom to form a strong bond (and come in closer! It is sigma2s(2)sigma2s*(2)sigma2p(2)pi2p(4)pi2p*(4)Bond order 1. Diatomic Species by Molecular Orbital Theory. was last updated on 28th December 2020 But MOT is a bond theory and Li2+ has no bond unless you're talking about (Li-Li)2+. If you're trying to compare Li2+ and Li2 I don't know if it's possible, i've never seen something like that. Do you predict that this molecule will be stable? site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Li 2−
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