Predicting the Bond-Order of Oxides based Acid Radicals
- Page ID
- 35867
Innovative study for the prediction of bond order in case of oxide based acid radicals have been discussed here1-3.
In case of oxide based acid radicals
Bond Order (B.O.) = Valency of the peripheral atom + (Charge on Acid Radical / Total number of peripheral atoms)
Eg.:
- ClO4- : (Valency of one Peripheral atom Oxygen = 2, Charge on acid radical = -1, Total Number of Peripheral atoms = 04), Therefore B.O. = 2 + (-1/4) = 1.75
- ClO3- : (Valency of one Peripheral atom Oxygen = 2, Charge on acid radical = -1, Total Number of Peripheral atoms = 03), Therefore B.O. = 2 + (-1/3) = 1.66
- ClO2- : (Valency of one Peripheral atom Oxygen = 2, Charge on acid radical = -1, Total Number of Peripheral atoms = 02), Therefore B.O. = 2 + (-1/2) = 1.5
- AsO43- : (Valency of one Peripheral atom Oxygen = 2, Charge on acid radical = -3, Total Number of Peripheral atoms = 04), Therefore B.O. = 2 + (-3/4) = 1.25
- AsO33-: (Valency of one Peripheral atom Oxygen = 2, Charge on acid radical = -3, Total Number of Peripheral atoms = 03), Therefore B.O. = 2 + (-3/3) = 1.0
- SO42- : (Valency of Peripheral atom Oxygen = 2, Charge on acid radical = -2, Number of Peripheral atoms = 04), Therefore B.O. = 2 + (-2/4) = 1.5
- SO32- : (Valency of Peripheral atom Oxygen = 2, Charge on acid radical = -2, Number of Peripheral atoms = 03), Therefore B.O. = 2 + (-2/3) = 1.33
- PO43- ; (Valency of Peripheral atom Oxygen = 2, Charge on acid radical = -3, Number of Peripheral atoms = 04), Therefore B.O. = 2 + (-3/4) = 1.25
- BO33- ; (Valency of Peripheral atom Oxygen = 2, Charge on acid radical = -3, Number of Peripheral atoms = 03), Therefore B.O. = 2 + (-3/3) = 1
- CO32- ;(Valency of Peripheral atom Oxygen = 2,Charge on acid radical = -2, Number of Peripheral atoms = 03), Therefore B.O. = 2 + (-2/3) = 1.33
- SiO44-:(Valency of Peripheral atom Oxygen = 2,Charge on acid radical = - 4, Number of Peripheral atoms = 04), Therefore B.O. = 2 + (- 4/4) = 1
Relation (Bond order vs. Bond length, Bond Strength, Bond energy, Thermal stability and Reactivity)
B.O. α 1 / Bond length or Bond distance;
B.O. α Bond strength;
B.O. α Bond Energy;
B.O. α Thermal Stability; B.O. α 1 / Reactivity
Correlation (Literature values of bond-distances of some oxide based acid radicals with their predicted bond order values)
Literature values of the Cl-O average bond lengths in ClO4-,ClO3- and ClO2- ; As-O bond lengths in AsO43- and AsO33- with respect to their bond order values suggest that with increasing bond-order M-O bond length (Where M = Cl, As etc.) decreases which is shown in Table-1.
Oxide Based Acid Radicals |
Bond-Order Values |
Avg. M-O Bond-Distances As per Literature (Å) |
Remarks |
---|---|---|---|
ClO4- |
1.75 |
1.50 |
Increasing Bond-Order decreases Bond Length |
ClO3- |
1.6 |
1.57 |
|
ClO2- |
1.5 |
1.64 |
|
AsO43- |
1.25 |
1.75 |
|
AsO33- |
1.0 |
1.77 |
References
- Arijit Das,‘New Methods for Prediction of Bond Order of Mono and Diatomic Homo and Hetero Nuclear Molecules or Ions Having (1-20)e-s and Oxide Based Acid Radicals Without MOT – a Rapid Innovative Approach’,IJAR, 2013, 3(11), 41-43, ISSN-2249-555X.
- Arijit Das, ‘Simple Thinking Makes Chemistry Metabolic And Interesting- A Review Article’, IOSR-JAC, 2013, 6(4), 8-15, e-ISSN: 2278-5736, doi:10.9790/5736-0640815.
- Arijit Das, R.Sanjeev and V.Jagannadham, “Innovative And Time Economic Pedagogical Views In Chemical Education – A Review Article”, World Journal of Chemical Education, 2014, 2(3), 29-38, Science and Education Publishing , USA, DOI:10.12691/wjce-2-3-1.
External Links
- communities.<wbr/>acs.org/docs/DOC-46667
- communities.acs.org/docs/DOC-45853