41.Predict the numbers of C-O and C-N stretches in cis-.
(A)2,3
(B)2,4
(C)1,3
(D)2,1
(E) 2,2

42. The NO (nitrosy1) ligand shares many similarities with CO. Which of the following statements is NOT correct? (A) Like CO, it's a o donor and π acceptor and can serve as terminal or bridging ligand. (B) NO has two common coordination modes； linear and bent. (C) Linear NO is counted as a 2-electron donor, same as CO. (D) has been used as a vasodilator for the treatment of high blood pressure. (E) Cr(NO)4 is tetrahedral molecule.

43. All five complexes followed 18E rule. Which one has the largest ? (A) (B) (C) Cr(CO)6 (D) (E)

44. What is the bond order in complexes Cp2Mo2(CO)4? (A)1 (B)1.5 (C)2 (D) 2.5(E)3

45. How many bridging u-CO in ? (A)0(B)1 (C)2 (D)3 (E) 4

46. The reaction of Re(CO)5Br with the ion BrCH2CH2O- gave compound Y and Br-. Which one the following statement is NOT correct. (A) The most likely site of attack of this ion is Re metal. (B) Y obeys 18e rule. (C) No gas is evolved in the reaction. (D) Addition of solution of Ag+ to a solution of Y gave a white ppt. (E) NMR indicates the there are five distinct magnetic environments for carbon in Y.

47. Upon heating, the complex (CO)3Mn(PPh3)2(13COMe) lost a gas, what is the gas? (A) (B) (C)and (D)(E) None of above

48. What is Wilkinson's catalyst? (A) HRh(CO)2(PPh3)2 (B)(C) cis-IrCl(CO)(PPh3)2 (D) trans-IrCI(CO)(PPh3)2 (E) RhCI(PPh3)3

49. The β abstraction of CpFe(CO)2(CMe2D) by gave major product CpFe(CO)2(DMeC=CH2)+ and Y. What is Y? (A) Ph3C-H (B) Ph3C-D (C) CH2=CDMe (D) MeCD=CD2(E) None of above

50. The reaction of Cp2Sc(CH3) + C6H6 → Cp2Sc(C6H5) + CH4 is best descried as (A) Oxidative addition (B) Reduction elimination (C) Nucleophilic displacement (D) Sigma bond metathesis (E) None of above

1. 張老師為瞭解四所學校的教育機會均等情形，計算出四所學校的學生學習成就之變異數 （variance），從這些變異數中，下列哪一所學校的教育機會最均等呢？ (A) 1.00 (B) 1.50 (C) 2.50 (D) 5.00

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