dear Khan i really dont know how to thank you for all these lovely educational videos. i really wish you are lot richer, I wish I can make a proposal to warren buffet to make you a donation of atleast 2 billion dollars mate.
*_QUICK FACT_* *1) VSEPR Theory:* - VSEPR theory is used to predict molecular structures based on minimising electron pair repulsions. *2) Predicting Electron Cloud Geometry:* - For molecules with five electron clouds, the ideal geometry is *trigonal bipyramidal.* - This shape is exemplified with phosphorus pentachloride, where three chlorines are in the same plane (equatorial positions) and one above and one below the plane (axial positions). *3) Bond Angles in Trigonal Bipyramidal Geometry:* - _Equatorial_ chlorines form 120° angles with each other. - _Axial_ chlorines are 180° apart. - The angle between an *axial and an equatorial* chlorine is 90°. *4) Impact of Lone Pairs:* - Sulfur tetrafluoride (SF₄) exemplifies the impact of lone pairs on molecular geometry - Lone pairs are shown to take up more space and cause more repulsion than bonding pairs. *5) Minimising Electron Pair Repulsion:* - In SF₄, positioning the lone pair in the equatorial position minimises repulsion compared to placing it in the axial position. More detail at timestamp 9:55. *6) Predicting Molecular Geometry:* - The final shape of the molecule is determined by ignoring lone pairs and focusing on the arrangement of atoms. - For SF₄, ignoring the lone pair leads to the *seesaw geometry.* - Without the impact from lone pairs, molecules with five electron clouds would have the same molecular geometry as their electron cloud geometry. *(Trigonal Bipyramidal)*
Can someone explain why it's ok for Phosphorous to exceed the octet rule because it's in "Period 3"? I understand the formal charge part. Does it have something to do with its orbitals?
I was wondering the same thing, so I did some research online. One of the electrons in the 3s subshell (?) can enter an excited state and reside in one of the 3d subshell orbitals. Phosphorus is one of the atoms whose compounds can be an exception to the octet rule. Search for: Phosphorus pentachloride (PCl5) as exception to octet rule.
At last I think we are having 2 90 Degrees, that's 180 Degrees. One complete 180 degrees and one 120 degrees. Don't you think it's getting more than a 360 Degrees. Correct if any angle I measured wrong?? And how can this be possible..??/
for the first time in my life i enjoyed studying chemistry soo much that i forgot about length of this video best teacher ever
dear Khan i really dont know how to thank you for all these lovely educational videos. i really wish you are lot richer, I wish I can make a proposal to warren buffet to make you a donation of atleast 2 billion dollars mate.
*_QUICK FACT_*
*1) VSEPR Theory:*
- VSEPR theory is used to predict molecular structures based on minimising electron pair repulsions.
*2) Predicting Electron Cloud Geometry:*
- For molecules with five electron clouds, the ideal geometry is *trigonal bipyramidal.*
- This shape is exemplified with phosphorus pentachloride, where three chlorines are in the same plane (equatorial positions) and one above and one below the plane (axial positions).
*3) Bond Angles in Trigonal Bipyramidal Geometry:*
- _Equatorial_ chlorines form 120° angles with each other.
- _Axial_ chlorines are 180° apart.
- The angle between an *axial and an equatorial* chlorine is 90°.
*4) Impact of Lone Pairs:*
- Sulfur tetrafluoride (SF₄) exemplifies the impact of lone pairs on molecular geometry
- Lone pairs are shown to take up more space and cause more repulsion than bonding pairs.
*5) Minimising Electron Pair Repulsion:*
- In SF₄, positioning the lone pair in the equatorial position minimises repulsion compared to placing it in the axial position. More detail at timestamp 9:55.
*6) Predicting Molecular Geometry:*
- The final shape of the molecule is determined by ignoring lone pairs and focusing on the arrangement of atoms.
- For SF₄, ignoring the lone pair leads to the *seesaw geometry.*
- Without the impact from lone pairs, molecules with five electron clouds would have the same molecular geometry as their electron cloud geometry. *(Trigonal Bipyramidal)*
great video, thank you so much
Can someone explain why it's ok for Phosphorous to exceed the octet rule because it's in "Period 3"? I understand the formal charge part. Does it have something to do with its orbitals?
kid learn the basics before exploring advanced stuff
I wondered the same mate. You're on the right track. Period 3 introduces the d orbital block.
I was wondering the same thing, so I did some research online. One of the electrons in the 3s subshell (?) can enter an excited state and reside in one of the 3d subshell orbitals. Phosphorus is one of the atoms whose compounds can be an exception to the octet rule. Search for: Phosphorus pentachloride (PCl5) as exception to octet rule.
because is in the third period and it has more orbitals which means has the d orbital block...(for anyone who is asking the same thing)
Arkos 11 please shut the fuck many of us are in school and we cannot control how fast it goes kiddo
You can use molymod set to explain vsepr theory that would be better
At last I think we are having 2 90 Degrees, that's 180 Degrees. One complete 180 degrees and one 120 degrees. Don't you think it's getting more than a 360 Degrees.
Correct if any angle I measured wrong??
And how can this be possible..??/
Please i want to know how you got 30 before subtracting it from 40🙏
this is a great video but I CANT STOP SEEING THE SF4 AS A LITTLE MAN!! anyone else? or am i going crazy
Ur not going crazy dude. I see it too. We have an eye for art
Same