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Showing posts with label BACK BONDING. Show all posts
Showing posts with label BACK BONDING. Show all posts
Friday, August 6, 2021

Why Back bonding does not take place in P(SiH3)3 instead of phosphorus has lone pair and Silicon has vacant d-orbital but in N(SiH3)3 molecule back bonding does take place?

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Conditions for back bonding: (1) Both of the atoms bonded with back Bonding are must be present in  2nd-2nd or 2nd-3rd period. 4rth period...
Tuesday, January 5, 2021

What is/are correct statement about Boroxine ion (B3O6-3) and Borazole (Inorganic Benzene)/ B3N3H6?

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  (A) Both are planer and non polar (B) Both have aromatic character (C) Both have p pi -p pi  bond formed by pairing of unpaired electr...
Sunday, December 27, 2020

Why is BCl3 a strongerLewis acid than BF3 ?

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The strength of a Lewis acid is a measure of its ability to attract a pair of electrons on a molecule that is behaving as a Lewis base...

What are the characteristics features of π-bond ?

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(1) π-bond fired by lateral (sidewise) overlapping of atomic orbitals. (2) lateral overlapping is only partial, so bonds formed are weak...
Saturday, December 26, 2020

Which orbital has much overlap capacity?

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When internuclear distance is fixed then overlapping extent of atomic orbitals depends on directional nature of orbitals. And higher the dir...

Why the extent of overlap is more in 2p-3d than 2p-3p?

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The order of overlapping strength of orbitals is given as: 2pπ-2pπ>2pπ-3dπ>2pπ-3pπ>3pπ-3pπ. The strength of π-bond is directl...
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Friday, December 25, 2020

How to determine order of bond angle of Me-O-Me, H3Si-O-SiH3 and (ph)3Si-O-Si(Ph) ?

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  (1) Oxygen of Me-O-Me is sp3 hybridised so C-O-C bond angle is more than 109’28” approx 110” due to crowding of methyl group. (2) In ...

How to compared bond angle (C-N-C) and (Si-N-Si) in trimethyl amine and trisilyl amine respectively?

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Nitrogen (N) atom in trimethyl amine [N(CH 3 ) 3 ] is  sp3 hybridised and tetrahedral ( bond angle ~107)  due to non bonding electron pair ...
Thursday, December 24, 2020

What is structure (CF3)2-Al-O-Al-(CF3)2 and also find the number of pi bond or Back bond?

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Generally neutral atom donates only one lone pair to back bonding because after that, electron density on that atom itself highly reduced bu...

What are the structure of (1) N(SiH3)3 (2) {(Me)3Si}2N-Si(Me)3 (3) HN(SiH3)2 and give the Answers of following questions?

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  Q (1): which is greater x or y? Q (2): which is greater x or z? Q (3): which have greater extent of back Bonding? SOLUTION: Ans...

Which of the following is correct order of (B-O) bond length of following compounds? (1) B(OH)3 (2) B(OMe)3 and (3) B(Me)2OH

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  SOLUTION: Extent Back Bonding is   3>1>2 and bond length order is  y>x>z   Related Questions: Why trimethylamine amine ( N(C...

Which of the following correct statement about structure of Ortho boric acid (H3BO3 ) is/are? Statements are as

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(1) Angle O-B-O =120    (2) Angle H-O-B >109  (3) Hybridization of atom O close to sp 2  and    (4) Molecule is non planer and ...
Monday, December 21, 2020

Why trimethylamine amine ( N(CH3)3) is tetrahedral while trisilyl amine (N(SiH3)3) planner.?

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Nitrogen (N) atom in trimethylamine [N(CH3)3] is sp3 hybridised and tetrahedral due to non bonding electron pair of N is localised (more ba...

What is the Si–N–C bond angle in Silyl isothiocyanate and methyl isothiocyanate (H3CNCS)?

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The hybridization of Nitrogen in Methyl isothiocyanate (H 3 CNCS) is Sp2. Thus bond  angle (< C-N-C)  is expected to be 120°. But it is  ...

What are the order of extent back bonding, Lewis acid character and nucleophilicity of (BF3, BCl3, BBr3, BI3)boron trihalides?

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(1)  Back bonding extent in boron tri halides decreases from BF 3 to BI 3  because on increasing of size of p-orbital of halogens atom the ...