QUESTION 5 Which of the following is (are) conjugated dienes? Only I I, II, and III Only II Only I and II 0000 III

4. What is the meaning of: [a] s-cis diene [b] stereo dot [c] bridgehead position

Give at least 7 topics for investigatory project in organic chemistry

Which of the following will exhibit cis-trans isomerism? Fe°: [Ar]4s?3d6 Cdº: [Kr]5s²4d10 Pt0: [Xe]ós²5d® O A. [FeBr2Cl2]2 O B. [Cd(NH3)2(H20)2]2+ O C. [PtBr2(NH3)2] O D. All of the above.

2. Which of the following molccules is achiral? HOH HO,CH H. CH, II A)I IV C) II D) IV and V

Select to Draw Os04 (catalytic) NMO OH OH

Giventhefollowingsetofreactionsandtheirenthalpies,drawtheBorn-Habercyclefortheformationof LiCl(s)anddeterminethelatticeenergyforLiCl.Reactions:H (in kJ)(1)Li(s)Li(g);Hs= 161;(2) Li(g)Li+(g)+e–;IE= 520;(3) ½Cl2(g)Cl(g);½BE =121.5;(4)Cl(g)+ e–Cl–(g);EA= –349;(5)Li+(g)+ Cl–(g)LiCl(s);UL= ?(UL= latticeenergy)(6) Li(s)+ ½ Cl2(g)LiCl(s);Hof=–408.6._______________________________________________________________________________

Which molecular orbital (MO), from the diagrams shown below, best explains that electrons can move throughout the molecule in allyl carbocation? antibonding MO non-bonding MO bonding MO 888 88 888 4 MO Diagram 1 888 881 888 4 MO Diagram 2 - 888 884 8 8 8 4 MO Diagram 3 (A) bonding MO of Diagram 1 (B) bonding MO of Diagram 2 (C) bonding MO of Diagram 3 Dnon-bonding MO of Diagram 2 (E) non-bonding MO of Diagram 3