43. Which of the following mechanism for the illustrated reaction is consistent with these observations?●The reaction is first order in [Cp(CO)₂Re(CH₂CD₂CD₂CH₂)]● The reaction is zero order in PPh₃●CO dissociation does NOT occur during the reaction (A) (B) (C) (D)(E)

4. Both ZnS and CaF₂ have a face-centered cubic unit cell where the S²⁻ and Ca²⁺ ions are closest packed in each structure. Which of the following is true? (A) There are 4 tetrahedral holes empty in each structure. (B) In both compounds, one-half of the tetrahedral holes are filled. (C) In both compounds, all the tetrahedral holes are filled. (D) There are 8 Zn²⁺ ions and 4 F⁻ ions in the unit cell. (E) In ZnS, one-half of the tetrahedral holes are filled by Zn²⁺ ions, whereas in CaF₂ all the tetrahedral holes are filled with F⁻ ions.

43. Which of the following mechanism for the illustrated reaction is consistent with these observations?
●The reaction is first order in [Cp(CO)₂Re(CH₂CD₂CD₂CH₂)]
● The reaction is zero order in PPh₃
●CO dissociation does NOT occur during the reaction
(A)
(B)
(C)
(D)
(E)

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