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- Pick all of the symmetric resonance structures of the SO2 molecule. (a) ö=s-ö: (d) ö=s=Ö: (9) : ö –s=ö (b) : ö =s=ö (e) Ö=s=ö (h) ö-s-ö (c) ö=s-Ö: (1) :ö-s-0: (1) :Ö-s=ö2. The full structural formulae of three organic compounds, P, Q and R, are shown below. H H H H HH HHHH Н-С -с- Н H-C- C - C = C – H H - C - C = C – C – H H H H H Q P (a) State one similarity between P, Q and R in terms of their molecular formulae. (b) Name the homologous series that compounds P, Q and R belong to. (c) State one similarity between Q and R in terms of chemical bonding id) Which of these compounds are isomers? Explain your answer.Another reagent that can be used to convert carboxylic acids into acid chlorides is phosphorus trichloride (PCI3), as shown in the scheme below. :0: :0: :ö: PCI2 + -PCI2 H. H :O: + НОРCI2 The mechanism, for the reaction, is shown above but the curved arrows and the formal charges, on the respective atoms, have been omitted. (a) Draw the missing curved arrows for each step (b) Supply any missing formal charges
- Determine whether the following pairs of structures are actually different compounds or simply resonance forms of the same compounds. 1-41 0 0 and and (b) (a) O +0-H O 0-H and and (d) +NH₂ 0 NH₂ CH,-!-H + (e) CH₂=C H and CH₂-CH (Đ) CH–C−NH, and CH3–C=NH, + (g) CH₂=CH-CH₂ and CH₂-CH=CH₂ (h) CH₂=C=0 and H=C=C—OH Ο Η 0 H 0 H +O-H (i)/H-C-C-H and H-C=C-H (j) H-C-H and H¬C-H g H H O- 유 0 « -l- + (k) H-C-NH₂ and H-C=NH₂ (1) CH₂-C-CH=CH₂ and CH₂-C=CH-CH₂Specify the formal charges on the atoms labeled a-c in each structure. b a:0: CH3CH2, CH2CH3 b H3CN-CH3 CH;CH2 CH2CH3 ČH3 a a b bWrite the contributing resonance structures and resonance hybrid for each of the following: (a) CH;CH=CH-CH=OH (f) CH3 (b) CH2=CH-CH-CH=CH2 (g) CH3-S-CH, (h) CH3-NO, (d) CH2=CH-Br CH, (e)
- Which of the following is a resonance structure of the compound below? 0=0 H CH₂CH3 || III ON H₂C H₂C 11 Нас-с CHOH CH3 HẠCHO CH E ||| :0 HC CH3 IVWrite in the structures for compounds A, B, and C. (6pts) 1. KMnOg/OH-- НЕАТT COMPOUNDA 2. H+ HNO3 COMPOUNDA COMPOUNDB H2SO4 Br2 COMPOUNDB COMPOUNDC FeBr3Bond energy and enthalpy Data at 298 K: Bond energy (in kJ mol-'): D(C-C) = 347 %3D D(C-H) = 413 D(H-H) = 436 Latent heat of sublimation of carbon: AsubH°(C(s))= 716 kJ mol-' Write the chemical equation of the reaction of formation of ethane H3C-CH3 (g).
- (1) (ii) (iii) (iv) (v) What is the relationship between the compounds [Cl-Ag-SCN]™ and [SCN-Ag-CIJ? Name the compounds whose molecular formulae are given in Question 1(a) (i). Which of the compounds, [Cl-Ag-SCN] and [SCN-Ag-CI], is the more stable? Explain your answer. Draw the boundary surfaces of all 3d orbitals and label these orbitals according to the conventional nomenclature. Clearly draw and label the Cartesian axes. Draw the crystal field splitting diagram for a linear compound, e.g. [Cl-Ag-SCN] or [SCN-Ag-CI], aligned along the z-axis. You only need to indicate the order of the individual d orbitals as a function of the energy. Explain your answer.Using the bond brekage and formation energy values, calculate the AH of the reaction below in kJ. C-H = 413 kJ mol", CI-CI = 243 kJ mol", F-F = 159 kJ mol, C-F = 453 kJ mol1, C-CI = 339 kJ mol-1, H-F = 565 kJ mol1, H-CI = 427 kJ mol1 %3D CH.(g) + Cl2(g) + F2(g) – CH,FCI(g) + HF(g) + HCI (g)(5) (6) (7) 요 Ph CO₂Me ? Et₂NH, NaBH4 NH₂ Br2, NaOH H₂O OH