GATE CY topic:organometalics PYQs & Answers — Page 2

Questions 11–20 of 33. Imported answers require independent review unless marked reviewed.

The organometal catalyst for the following transformation is

Your answerChoose one option.

Diagram for Chemistry question 26 (figure 2)

Diagram for Chemistry question 26 (figure 3)

Diagram for Chemistry question 26 (figure 4)

Diagram for Chemistry question 26 (figure 5)

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The major product obtained by the treatment of (

-C

)

Ni with Na/Hg in ethanol is

Your answerChoose one option.

(

-C

)(

-C

)Ni

(

-C

)

(

-C

)(

-C

)Ni

(

-C

)

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The correct statement(s) regarding Co₂(CO)₈ is(are)

Your answerSelect all correct options. You can choose more than one.

It reacts with Na to give Na[Co(CO)₄]

It contains three bridging carbonyls

It can be prepared by reductive carbonylation of Co(OAc)₂·4H₂O

Two isomers exist in hexane solution

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Number of carbon atoms connected to the metal center in [W(C₆₀)(CO)₅] is ______ (rounded off to the nearest integer)

(Given: atomic number of W is 74)

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The number of metal-metal bond(s), with

, and

character, present in [Mo

(CH

)

] complex is(are), respectively,

Your answerChoose one option.

1, 2, 1

1, 2, 0

1, 1, 0

1, 1, 1

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The CORRECT distribution of the products in the following reaction is

CH₃C(=O)Mn(CO)₅, with one ¹³CO ligand, heated (△), decarbonylation.

Your answerChoose one option.

Diagram for Chemistry question 46 (figure 2)

Two product structures: first has CH₃ above Mn, three CO ligands and one ¹³CO ligand; 25% + second has CH₃ above Mn, three CO ligands and one ¹³CO ligand; 75%.

Diagram for Chemistry question 46 (figure 3)

Two product structures: first has CH₃ above Mn, three CO ligands and one ¹³CO ligand; 20% + second has CH₃ above Mn, three CO ligands and one ¹³CO ligand; 80%.

Diagram for Chemistry question 46 (figure 4)

Three product structures: CO above Mn, CH₃ at upper right, and other CO ligands; 25% + CO above Mn, CH₃ at lower left and ¹³CO at upper right; 25% + CO above Mn, CH₃ at upper left and ¹³CO at upper right; 50%.

Diagram for Chemistry question 46 (figure 5)

Three product structures: CO above Mn, CH₃ at upper right, and other CO ligands; 20% + CO above Mn, CH₃ at lower left and ¹³CO at upper right; 20% + CO above Mn, CH₃ at upper left and ¹³CO at upper right; 60%.

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The compound(s) that satisfies/satisfy the 18-electron rule is(are) (Atomic number of Os = 76, Rh = 45, Mo = 42, and Fe = 26)

Your answerSelect all correct options. You can choose more than one.

Diagram for Chemistry question 55 (figure 2)

Diagram for Chemistry question 55 (figure 3)

Diagram for Chemistry question 55 (figure 4)

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The Mo–Mo bond order in [η⁵-C₅H₅)Mo(CO)₂]₂ which obeys the 18-electron rule is ______.

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The geometry and the number of unpaired electrons in tetrakis(1-norbornyl)Co

respectively, are:

Your answerChoose one option.

tetrahedral and one

tetrahedral and five

square planar and one

square planar and three

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The CORRECT statement regarding the substitution of coordinated ligands in Ni(CO)₄ and Co(NO)(CO)₃ is:

(Given: Co–N–O bond is nearly linear; atomic numbers of Co and Ni are 27 and 28, respectively)

Your answerChoose one option.

Ni(CO)₄ and Co(NO)(CO)₃ follow associative and dissociative pathways, respectively.

Ni(CO)₄ and Co(NO)(CO)₃ follow dissociative and associative pathways, respectively.

Both Ni(CO)₄ and Co(NO)(CO)₃ follow associative pathway.

Both Ni(CO)₄ and Co(NO)(CO)₃ follow dissociative pathway.

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GATE CY topic:organometalics PYQs

Question 26

Question 41

Question 53

Question 59

Question 19

Question 46

Question 55

Question 21

Question 26

Question 8