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Q.

The fixation of N2 by certain bacteria is a biological reduction reaction of great interest. Very few nonbiochemical systems are known which will react with N2  at room temperature and atmospheric pressure one such compound is the titanium (II) compound titanocene,(C5H5)2Ti   sometimes also abbreviated as  Cp2Ti, a sandwich compound like ferrocene. Select the correct statement(s) about titanocene (I) and its dinitrogen complex [Bond length of free N2109.8  pm]

Note: Consider N2 as Pi acceptor.
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a

The IUPAC name for the complex (II) would be bis(cyclopentadienyl) bis (dinitrogen) titanate (II)

b

NN bond lengths in the complex will be higher than 109.8 pm

c

The NN bond length in the complex is less than 109.8 pm

d

Of the two complexes, only complex (II) follows Sidgwick EAN rule

answer is B, D.

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Detailed Solution

bis (cyclopentadienyl) bis (dinitrogen) titanium (II)
De to back bonding, electrons enters into ABMO of  N2 so bond length N-N bond increases 

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