Choose the isoelectronic pair among the following: A. [V(CO)₆] B. [Cu(η⁵-C₅H₅)(CO)] C. [Co(CO)₄]⁻ D… · ABC26IN0263
Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: 18 Electron Rule · Exam: CSIR NET 2017 · Marks: 2 · Difficulty: Medium
Choose the isoelectronic pair among the following: A. $\mathrm{[V(CO)_6]}$ B. $[\mathrm{Cu}(\eta^5\text{-}\mathrm{C_5H_5})(\mathrm{CO})]$ C. $\mathrm{[Co(CO)_4]^-}$ D. $\mathrm{[IrCl(CO)(PPh_3)]}$
(a)A and B
(b)B and C
(c)C and D
(d)A and D
Answer
Answer (as printed): B
Explanation
The species having same number of electrons are called isoelectronic. A =[V(CO)6]=5+12=17e- B =[Cu(η5- C5H5)(CO) ]=11+5+2=18e- C =[Co(CO)4]-1 =9+8+1=18e- D=[IrCl(CO)(PPh3)2] = 9+1+2+4=16e- Therefore B and D are isoelectronic species .
Explanation as extracted from the printed page; notation may be imperfect.