Organometallic And Bioinorganic Chemistry Mock Tests

Which of the following organometallic complexes does NOT obey the 18-electron rule? (Count valence electrons using the neutral atom method: metal contributes its group number electrons, each CO ligand donates 2 electrons, each Cl radical donates 1 electron, and each cyclopentadienyl ligand (C₅H₅) donates 5 electrons.)

According to the 18-electron rule, which of the following complexes is expected to be the most stable?

In haemoglobin, the cooperative binding of oxygen to the four heme centres is explained by the concerted T (tense) ↔ R (relaxed) state model (Monod-Wyman-Changeux model). Which of the following statements correctly describes the T and R states? (Consider the position of the iron atom in the porphyrin plane, the spin state of Fe²⁺, and the oxygen affinity of each state.)

The Wacker process for the oxidation of ethylene to acetaldehyde uses which catalytic system?

According to the 18-electron rule, which of the following organometallic complexes does NOT obey the rule?

The 18-electron count for Fe(CO)₄(PPh₃) is (Fe has 8 valence electrons, CO and PPh₃ are 2-electron donors):

Which of the following organometallic complexes does NOT follow the 18-electron rule?

Which of the following metallocene complexes is paramagnetic with two unpaired electrons? (Count valence electrons using the neutral atom method and consider the crystal field splitting in the ligand field of the cyclopentadienyl ligands.)