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In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging?
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In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears...
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Valence electron count:
The valence electron count of the complex can be calculated by adding the number of valence electrons contributed by each ligand to the number of valence electrons of the metal ion. In this case, the metal ion is Ni(II), which has 10 valence electrons. Each η5-Cp ligand contributes 5 valence electrons (one for each carbon atom) and each CO ligand contributes 2 valence electrons. Therefore, the valence electron count is:
10 (Ni) + 2(η5-Cp) x 5 + 2(CO) x 2 = 18
Nature of M-CO bond:
The IR stretching frequencies of CO ligands in a complex can provide information about the nature of the M-CO bond. In general, a lower IR stretching frequency indicates a stronger M-CO bond, and a higher frequency indicates a weaker bond. In this complex, there are two CO ligands, and two different stretching frequencies are observed: 1857 cm-1 (strong) and 1897 cm-1 (weak).
The stronger stretching frequency (1857 cm-1) corresponds to a terminal CO ligand, where the CO group is directly bonded to the metal ion. The weaker stretching frequency (1897 cm-1) corresponds to a bridging CO ligand, where the CO group is bonded to both metal ions in the dimeric complex.
Therefore, the nature of the M-CO bond in this complex is:
- One terminal CO ligand, with a strong stretching frequency of 1857 cm-1
- One bridging CO ligand, with a weak stretching frequency of 1897 cm-1.
Valence electron count:
The valence electron count of the complex can be calculated by adding the number of valence electrons contributed by each ligand to the number of valence electrons of the metal ion. In this case, the metal ion is Ni(II), which has 10 valence electrons. Each η5-Cp ligand contributes 5 valence electrons (one for each carbon atom) and each CO ligand contributes 2 valence electrons. Therefore, the valence electron count is:
10 (Ni) + 2(η5-Cp) x 5 + 2(CO) x 2 = 18
Nature of M-CO bond:
The IR stretching frequencies of CO ligands in a complex can provide information about the nature of the M-CO bond. In general, a lower IR stretching frequency indicates a stronger M-CO bond, and a higher frequency indicates a weaker bond. In this complex, there are two CO ligands, and two different stretching frequencies are observed: 1857 cm-1 (strong) and 1897 cm-1 (weak).
The stronger stretching frequency (1857 cm-1) corresponds to a terminal CO ligand, where the CO group is directly bonded to the metal ion. The weaker stretching frequency (1897 cm-1) corresponds to a bridging CO ligand, where the CO group is bonded to both metal ions in the dimeric complex.
Therefore, the nature of the M-CO bond in this complex is:
- One terminal CO ligand, with a strong stretching frequency of 1857 cm-1
- One bridging CO ligand, with a weak stretching frequency of 1897 cm-1.
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In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging?
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In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging?.
In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the complex, [Ni2(η5-Cp)2(CO)2] the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron count and the nature of the M—CO bond respectively are: a) 16 e-, bridging b) 17 e-, bridging c) 18 e-, terminal d) 18 e-, bridging?.
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