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13 5.Which of each of the pairs below is the LEAST stable? (for a-d) State whether...
13. Which of the pairs of molecules below can only have dipole-dipole interactions (as well as London Dispersion Forces)? a) O=C=0 and O=C=0 c) and O=0 H b) H d ) and Na + and H1 H HT H H 0 C. c) only B. b) only A. a) only E. b) and c) F. c) and d) D. d) only
13. Which of the pairs of molecules below can only have dipole-dipole interactions (as well as London Dispersion Forces)? a) O=C=O and O=C=O c) and O=0 b) H H H1 TH and Na + and HT H Neo H H A. a) only B. b) only C. c) only D. d) only E. b) and c) F. c) and d)
HH 13. Which of the pairs of molecules below can only have dipole-dipole interactions (as well as London Dispersion Forces)? a) O=C=0 and O=C=0 c) 9 and b) Hi H O=0 and Na + d) HT H and preo H A. a) only B. b) only C. c) only D. d) only E. b) and c) F. c) and d) 14. Which molecules are non-polar? A. SF4 B. CF4 C. H2O D. CH2Cl2 E. 03 15. Which of the following...
Which Allene is least stable? Which alkene is least stable? A I B) II C) III D None of these
onsider each pair of molecules below. State whether they represent the same compound (identical), whether they are different molecules with the same molecular formula (constitutional isomers), or whether they are different molecules that are not isomeric (different molecular formulas- neither). (2 pts each) H2CCH2 H2CCH2 CH3 b) он H2 FCH CH CH2F H3C erther conshtuhonal isomers /22
Rank the following allylic carbocations in order from least stable to most stable THEN justify your answer in words: For each of the following pairs of compounds, circle the one that is the stronger acid: Which one of the following is the MOST stable carbocation? Circle the correct answer.
Q1) For each of the following compounds, determine the formal oxidation state of the transition metal and the corresponding number of d electrons. State whether each one is likely to be stable enough to be characterized. (1) [Re(CO)5] (2) [HFe(CO)4]- (3) ((ŋ6-C5H5)2Fe) (4) ((ŋ6-C6H6)2Cr) (5) ((ŋ5-C5H5)ZrCl(OCH3) (6) (IrCl(PPh3)3) (7) (Mo(CO)3(PPh3)3) (8) (Fe(CO)4(C2H4)) (9) (W(CO)5Cl)- (10) Ni(CO)4)Q2) Use the 18-electron rule to predict the number of carbonyl ligands, n, in each of the following complexes: (1) [Cr(CO)n] (2) [Fe(CO)n(PPh3)2)] (3) [Mo(CO)n(PMe3)3] ...
5. Which of the five carbocations shown below is the most stable (will not rearrange) and which one(s) will undergo carbocation rearrangement? Indicate the correct structures of the products of each of the carbocation rearrangements. To practice for the exam: Where applicable, use the curved arrow(s) to clearly draw the mechanism of the carbocation rearrangement. CD A. carbocation C is most stable and will not rearrange, and the products of rearrangements are go on Jor a from A from B...
30) Which of the following is the most stable diene? L. IV. A)I B) C)III D)IV E) V 31) Which of the following is an aromatic hydrocarbon? IV -CH A)I B C)ID)IVE) V 32) Which of the following conjugated dienes will not react with a dieneophile in a Diels-Alder reaction? Π. IV A) I B)11 C)111 D) IVE) I and III 33) The conjugate acid of the compound shown below is B) aromatic D) antiaromatic. E) none of the above....
7-66 Indicate whether or not both members of each of the following pairs of physical state changes have the same thermicity (both exothermic or both endothermic). a. sublimation and condensation b. freezing and deposition og c. melting and evaporation because d. deposition and condensation