`Fe(eta^(5)-C_5H_5)` ಸೂತ್ರದಲ್ಲಿ, `eta^(5)` ಪೂರ್ವಪ್ರತ್ಯಯವು ಏನನ್ನು ಸೂಚಿಸುತ್ತದೆ?

In the formula Fe(eta^(5)-C_5H_5) , what does the prefix eta^(5) denote?

The realtive stabilities of metal carbonyls and their ions can be explained on the basis of a rule which is known as 18e^(-) rule. If number of valence shell electrons of the metal + number of electrons donated by bonded CO groups comes to be 18 electrons, then carbonyl is said to be stable. Some heteroleptic/noncarbonyl complexes also follow 18 electron rule. Identify the number of complexes following the rule. [Mn(CO)_(5)], [Co(CO)_(4)] [(eta^(5)-C_(5)H_(5))_(2)Fe] , [(CO)_(5)(PF_(3))]^(+), [(eta^(5)-C_(5)H_(5)) [Cr(NO)_(4)], Fe(CO)_(2)Cl] , [Fe(CO)_(2)(NO)_(2)], [Fe(CO)_(5)], [Mn_(2)(CO)_(10)]

The correct IUPAC name of Fe(C_(5)H_(5))_(2) is

The coordination number of Fe in [Fe(eta^(5)-C_(5)H_(5))_(2)] is 2x . Then x will be ______

If (eta^(5)-C_(5)H_(5))" "M(C_(2)H_(4))_(2) follows EAN rule, the central metal atom/ion would be :