Last minute chem doubts
I'm blanking like hell here so, couple of rapid fire doubts.
1. What are the deciding factors for melting point and boiling point of compounds? Specifically substituted benzenes.
When does dipole moment come into play and when is it important to consider H-bonding?
2. For hybridisation of orbitals (or LCAO, whichever one you prefer), how does one decide which orbitals hybridise from a given set?
Eg: For a sp³d hybridisation, can we know which d orbital is chosen? The d orbitals are initially degenerate so, what criterion applies?
I thought I had these in notes, but apparently I don't. 🤷♂️
13 Replies
@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.@iTeachChem sorry for the ping but could you help with the second doubt?
never bro ping anytime
i think it has to do with the spacial orientatation of the d orbitals
does this help?
https://en.wikipedia.org/wiki/Ligand_field_theory#:~:text=In%20ligand%20field%20theory%2C%20the,raised%20or%20lowered%20in%20energy
Ligand field theory
Ligand field theory (LFT) describes the bonding, orbital arrangement, and other characteristics of coordination complexes. It represents an application of molecular orbital theory to transition metal complexes. A transition metal ion has nine valence atomic orbitals - consisting of five nd, one (n+1)s, and three (n+1)p orbitals. These orbitals ...
for 1 - mug data. being real wtih you. if you go with logic, thre will be exceptions.
...the exam is tomorrow.
boiling point:
hydrogen bonding, van der waal interactions, etc etc
attractive forces basically
uhh wait
BYJUS
Boiling Points of Functional Groups: Introduction, Factors affectin...
Boiling Points of Functional Groups: When different functional groups are attached to the hydrocarbon, it changes the intramolecular force of attraction between the molecule, thus changing the boiling point of the molecule. The larger the force of attraction between the molecules the more would be its boiling point.
also, more carbon atoms (longer chain) => more van der waal => more boiling point
In melting point as far as I remember (not sure so take with a grain of salt) it depends on symmetry/packing, dipole moment, van der waal interactions and H-bonding.
lol then get off discord yo
wait
WAIT
HOW IS THIS WORKING
😭😭