2007-07-25 05:54:19 · 5 answers · asked by boo 1 in Science & Mathematics ➔ Chemistry
BF4- and ClNO and calculating the formal charges fo each
2007-07-25 06:07:43 · update #1
draw a lewis structure of what?
Thanks for posting additional details.
Formal charge is NOT oxidation number.
Formal charge assume all atoms have the same electronegativity. So, what you need to draw the structures first.
BF4- has 4 B-F single bond
you just split those bonds equally. each atom gets 1 electron.
B will end up with 4. F will end up with 7 (1 from bond and 3 lone pairs) Then compare to the atomic form. B is group 3, that means it had 3 electrons to begin with. Now there are 4, so it gains 1. That makes the formal charge -1 since elctron is negative. F had 7 to begin with, now still 7, so formal charge is 0.
ClNO, Nitrosyl chloride has 1 single bond between Cl and N, a double bond between N and O. Now split them equally.
Cl has 3 lone pair and 1 electron from the bond. Began with 7 electrons (group number), end up with 7. Formal charge 0.
N has 1 lone pair, 1 electron from Cl-N bond, 2 electrons from N=O bond, totally 5. Began with 5, end up with 5, formal charge also 0.
O has 2 lone pairs, 2 electrons from N=O bond. Began with 6, end up with 6, formal charge also 0.
2007-07-25 06:02:46 · answer #1 · answered by Carborane 6 · 2⤊ 1⤋
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formal charge is the charge regardless of any unequal charge sharing (that is electronegativity). The sum of formal charges add up to the molecular charge. By using the vertical groups of the atoms on the periodic table it is possible to determine that each hydrogen contributes 1 electron, the oxygen contributes 6 electrons, and the charge of +1 means that 1 electron is absent. Thus there are 8 electrons: 6 from O; 3 from H; and subtract one for the charge. All the Hs have one bond and no charge; the +1 is assigned to the O summary: each H: 0 the O +1
2016-04-02 02:07:31 · answer #2 · answered by ? 4 · 0⤊ 1⤋
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drawing a lewis sturcture and calculating the formal charges of each atom. sorry i ask the question worry?
2015-08-16 20:21:45 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Clno Lewis Structure
2016-10-01 09:50:21 · answer #4 · answered by ? 4 · 0⤊ 0⤋
B has an oxidation state of +3, it has 4 covalent bonds, and 8 electrons in its outer level - all bonding pairs. It has an actual charge of -1, and each F has an oxidation state of -1 (and 8 electrons in the outer level). It is usually formed from BF3 + F-, so one of the covalent bonds is a dative covalent bond.
Cl-N=O: the Cl is -1, the O is -2 and the N is +3, with a lone pair.
2007-07-25 06:20:32 · answer #5 · answered by Gervald F 7 · 0⤊ 2⤋
The answer to B is 0 and the answer to C is -1. This is straight from webassign, i have that too. These are the same questions that I have. I go to LSU, if u ever need more help email me. BTW the other dudes answers from one minute before me are way wrong !!!!!!
2016-03-16 21:16:14 · answer #6 · answered by ? 4 · 0⤊ 0⤋