[Ni (NH3)6]2+paramagnetic While [Ni (CN) 6]4-diamagnetic

blogger-disqus-facebook PG.CHEMEASY Home / [Ni(NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic / INORGANIC / [Ni (NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic [Ni (NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic 0

Why is [Ni (NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic?

In the both cases, the co-ordination number of nickel is six with octahedral geometry. The oxidation number of nickel is +2 with 3d8 system. Crystal field theory requires the splitting of the degenerate d-orbitals with the approaching of the ligands. Therefore, under the influence of octahedral crystalfield, the d-orbitals are split up into set of energetically different orbitals. One is energetically higher eg level and the other is energetically lower t2g level. Now, in case of [Ni (NH3)6]2+complex ion, the ligand NH3 is neither a strong field ligand nor a weak field ligand. Actually, it is mild strong field ligand. But in case of [Ni (NH3)6]2+ ion, ligand NH3 act as a weak field ligand as crystal field stabilization energy is less than pairing energy. That is, 10Dq < P. Therefore, under the influence of octahedral crystal field, the electronic configuration is t2g6 eg2. From the above electronic configuration, it has been found that the complex has two unpaired electrons. Hence the complex [Ni (NH3)6]2+ is paramagnetic. On the other hand, in case of [Ni (CN) 6]4- complex ion, the ligand CN–is sufficiently strong field ligand. Hence, in this case the interactions are much more. So, the single electron in dx2-y2 orbital is repelled by the four ligands whereas the electron in the dz2 orbital is repelled by only two ligands. Thus, the energy of dx2-y2 orbital becomes higher than that of dz2 orbital. Hence, in presence of a sufficiently strong field ligand the energy difference between these two orbitals exceeds the pairing energy of the electrons. That is, 10Dq > P. Under this condition, in order to get a more stable configuration both eg electrons are paired up and occupy the low lying dz2 orbital leaving the dx2-y2 orbital empty. Therefore, the preferred electronic configuration is dxz2, dyz2, dz22, dxy2, dx2-y20. From the above electronic configuration, it has been found that the complex has no unpaired electrons. Hence the complex [Ni (CN) 6]4- is diamagnetic. Why is [Ni (NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic? Why is [Ni (NH3)6]2+ ion paramagnetic? Why is [Ni (CN) 6]4- ion diamagnetic? What is the hybridization of [Ni (NH3)6]2+ and [Ni (CN) 6]4- complex ions? Read more: HF acid strength and pH calculation. Tags: [Ni(NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic INORGANIC INORGANIC

No comments

Subscribe to: Post Comments ( Atom )

Search This Blog

Popular Posts

  • Why are sigma bond more stronger than pi bond ?   Why are  sigma bond more stronger than pi bond ?   A sigma bond is formed by the face to face overlapping of two 's' orbit...
  • What is pseudotropism ? Q. What is pseudotropism ?    Definition of pseudotropism. There are few examples of tautomerism in which case only one tautomer...
  • Magnetic properties of transition metals.   Magnetic properties of transition metals. The magnetic moment of an electron is partly due to its spin motion and partly due to i...
  • Centre of symmetry and alternating axis of symmetry What is elements of symmetry ? Organic molecules are covalent compounds having definite bond length and bond angles among the constituen...
  • Phenol definition-Phenol structure and Identification in chemistry Phenol definition in organic chemistry   The hydroxyl derivatives of aromatic hydrocarbon which contain hydroxyl group   are known as...

Recent post

3/recent-posts

Comments

5/recent-comments

LABELS

  • INORGANIC (77)
  • HOME (63)
  • ORGANIC (47)
  • 3 proto-tropic shifts and difference between tautomerism and resonance (1)
  • 4 (1)
  • 6-trinitro benzene occurs very easily ? (1)
  • Aspirin-use of aspirin and aspirin from phenol . (1)
  • Benzoic acid-definition-properties-preparation from benzene and phenol. (1)
  • Benzoic acid-weak acid-stronger than acetic acid weaker than formic acid. (1)
  • Benzyl alcohol to benzoic acid change-Schmidt reaction-HVZ reaction. (1)
  • Calculate the number of unpaired electrons and LFSE of [ Fe ( H2O)6 ]+3 ion . (1)
  • Calculate the spin only magnetic momentum µ of K3 [ Mn(CN)6] compound . (1)
  • Centre of symmetry and alternating axis of symmetry (1)
  • Co and Ni shows ferromagnetic properties (1)
  • Covalent bond-polar covalent bond-non polar covalent bond-examples (1)
  • Definition of Amadori rearrangement (1)
  • Definition of pericyclic reaction and its types (1)
  • Different type of tautomerism. (1)
  • Double salts-definition-examples and properties in co-ordination chemistry . (1)
  • EVERYDAY LIFE (1)
  • EVERYDAY LIFE CHEMISTRY (1)
  • Electromeric effect and mesomeric effect. (1)
  • Electron affinity and periodic variation of electron affinity. (1)
  • Electronegativity and Periodic variation of electronegativity (1)
  • Fajan’s rule-definition-postulates and examples (1)
  • Formal charge (1)
  • GREEN CHEMISTRY (1)
  • HF acid-properties-strength-pH calculation (1)
  • Halogen acids-strength-addition to alkenes. (1)
  • Halogen family elements-properties-periodic table-oxyacids-radioactivity. (1)
  • How -1 and 0 oxidation states of Ti are stabilized and What is Ziegler-Natta catalyst ? Give it’s use with example . (1)
  • How do you explained the bonding of the carbonyl groups in the structure of Fe2(CO)9 through IR-spectra ? (1)
  • How does ionization potential depends on atomic size nuclear charge and electronic configuration. (1)
  • How electronegativity depends on oxidation number-hybridization and what is group electronegativity ? (1)
  • Huckel’s rule of aromaticity and anti aromatic compounds (1)
  • Hydroiodic acid-formula-properties-uses with pH calculation (1)
  • INORGANI (1)
  • IUPAC name and structural formula of beta methyl butyric acid (1)
  • Importance of hydrogen bonding in biological system. (1)
  • Inert pair effect-definition-examples-cause-and consequences (1)
  • Isomerism and classification of structural isomerism (1)
  • Lanthanide contraction-definition-causes-consequences in chemistry (1)
  • Lattice energy of MgF2-CaF2-ZrO2 molecule-explanation-calculation (1)
  • Magnetic properties of transition metals (1)
  • Markownikoff’s-rule-definition-peroxide effect-limitation. (1)
  • Molecular orbital (M .O) theory (1)
  • Molecular orbital theory and stability of helium molecule (1)
  • N dimethyl aniline ? (1)
  • NO+ and CN ligand ? (1)
  • Na3N or NaF ? (1)
  • Nephelauxetic effect and Nephelauxetic series (1)
  • Nucleophilic substitution reaction (1)
  • OGRANIC (1)
  • Octet rule-definition-limitations of octet rule-hypovalent-hypervalent compounds (1)
  • Phenol definition-Phenol structure and Identification in chemistry (1)
  • Polarization meaning-Ionic potential-polarizability and polarizing power (1)
  • Pseudohalogen compounds and Pseudohalides . (1)
  • Sodium carbonate formula properties and uses (1)
  • Sodium carbonate preparation in Solvay process (1)
  • Structural formula and f IUPAC name of functional isomer of CH3-CH2 – O – CH3 (1)
  • TlCl more stable thanTlCl3 (1)
  • Triplet carbene is more stable than singlet carbene. (1)
  • Uses of hydrofluoric acid with health effect. (1)
  • VSEPR theory-definition-postulates-shape and limitations (1)
  • Werner’s co-ordination theory-primary valency-secondary valency (1)
  • What are green chemistry principles? (1)
  • What are oxidation and reduction reactions with example? (1)
  • What are the common uses of hydrochloric acid in chemistry (1)
  • What are the effects of air pollution on human health and environment? (1)
  • What are the harmful effects of acid rain on humans in chemistry? (1)
  • What are the main causes of acid rain in environmental chemistry? (1)
  • What are the various sources of carbon dioxide emissions? (1)
  • What are the10 causes of air pollution in environmental chemistry? (1)
  • What is Borodine Hunsdiecker reaction and its limitation ? (1)
  • What is chemical bonding and What is dative bond ? (1)
  • What is electro cyclic reaction and symmetry forbidden-symmetry allowed process ? (1)
  • What is environmental pollution in chemistry? (1)
  • What is ethylene oxide or oxiran? (1)
  • What is exchange energy of electron in chemistry? (1)
  • What is global warming meaning in environmental chemistry? (1)
  • What is ionization energy and why second ionization energy is greater than first ionization energy? (1)
  • What is kinetically and thermodynamically controlled reaction ? (1)
  • What is mescaline ? (1)
  • What is penetration effect ?How does penetration effect influence the ionization energy ? (1)
  • What is pseudotropism ? (1)
  • What is singlet and triplet carbene in chemistry? (1)
  • What is sodide ion ? How sodide ion stabilized in solution ? (1)
  • What is suspended particulates matter 2.5 and 10 in environment? (1)
  • What is the simplest way for converting CO2 to O2? (1)
  • Which have more π-acceptor strength among the CO (1)
  • Which one has more lattice energy (1)
  • Which one is more basic aniline or 4-bromoaniline ? (1)
  • Why C – O bond length in phenol is less than methanol and what is Bouveault Blanc reduction ? (1)
  • Why Fe (1)
  • Why the colour of trans [ Co (en)2 F2 ] + is less intense than that of cis [ Co (en)2 F2 ] + ? (1)
  • Why Cu is a poor reducing agent-explain. (1)
  • Why alkyl iodides are purple in the presence of sunlight and Role of solvents in SN1 and SN2 reaction ? (1)
  • Why are sigma bond more stronger than pi bond ? (1)
  • Why furan 2-aldehyde undergoes cannizaro reaction but pyrrole 2-aldehyde does not-explain ? (1)
  • Why is carbon dioxide a greenhouse gas? (1)
  • Why is chlorine (1)
  • Why is pyridine more basic than pyrrole and Why phenols are more acidic than methanol ? (1)
  • Why methyl chloride (CH3Cl) is inactive in SN1 reaction and (CH3)3C-Cl ( t-butyl chloride) is inactive in SN2 reaction ? (1)
  • Why most of the transition metals are used as catalysts ? (1)
  • Why phenol is stronger acid than alcohol and salicylic acid is a stronger acid than p-hydroxy benzoic acid ? (1)
  • Why phenol or benzenol is acidic and Why carboxylic acid is more acidic than phenol ? (1)
  • Why pyridine does not exhibits resonance and Why is phenol more acidic than cyclo hexanol ? (1)
  • Why quinuclidine is a stronger base than aniline and N (1)
  • Why the nucleophilic substitution reaction of 1-chloro-2 (1)
  • Xenon fluorides-xenon fluorides act as a strong oxidizing agent (1)
  • [FeF6]3– ion paramagnetic while [Fe(CN)6]4–ion diamagnetic (1)
  • [Ni(NH3)6]2+paramagnetic while [Ni (CN) 6]4-diamagnetic (1)
  • activating groups-explanation-list with application (1)
  • formal charge calculation and significance . (1)
  • friedel-crafts acylation reaction-friedel-crafts acylation of benzene-phenol-anisole and chloro benzene (1)
  • ortho and para directing and Why ‘Cl’-atom can not form H-bond but ‘N’-atom can ? (1)
  • periodicity and different atomic radius and ionic radius. (1)
  • ring-chain isomerism and metamerism. (1)
  • shielding effect Slater's rules and its limitations. (1)
  • stereo specific and stereo selective reaction (1)

Blog Archive

  • May (1)
  • April (1)
  • May (2)
  • March (1)
  • December (1)
  • November (2)
  • March (1)
  • February (1)
  • January (2)
  • December (3)
  • November (1)
  • October (5)
  • September (5)
  • August (4)
  • July (5)
  • June (7)
  • May (7)
  • April (9)
  • March (3)
  • February (2)
  • January (3)
  • December (5)
  • November (5)
  • October (2)
  • September (4)
  • August (5)
  • July (1)
  • March (5)
  • February (8)
  • January (10)
  • December (5)
  • November (13)
  • October (2)

visitors counter

Contact Form

Name Email * Message *

Followers

Popular Posts

  • Magnetic properties of transition metals. Magnetic properties of transition metals.   Magnetic properties of transition metals. The magnetic moment of an electron is partly due to its spin motion and partly due to i...
  • Why are sigma bond more stronger than pi bond ? Why are sigma bond more stronger than pi bond ?   Why are  sigma bond more stronger than pi bond ?   A sigma bond is formed by the face to face overlapping of two 's' orbit...
  • What is pseudotropism ? What is pseudotropism ? Q. What is pseudotropism ?    Definition of pseudotropism. There are few examples of tautomerism in which case only one tautomer...
Created By SoraTemplates | Distributed By Blogspot Themes Powered by Blogger.

Từ khóa » Ni(nh3)6 2+ Geometry