why is Si-O more polar than C-O? isn't carbon more electronegative than silicon?

Question

lgbasallote · Answer

@mukushla help

anonymous · Answer

im bad in chemistry :(

lgbasallote · Answer

didn't you say earlier you're a chemical engineering student?

anonymous · Answer

there is few chemistry courses in chemical engineering unlike its name

anonymous · Answer

main cousres of chem eng are transport phenomena, thermodynamics and unit opearations

anonymous · Answer

and now in MSc im doin a completely different branch of Chem Eng and it is Proccess Control...empty of chemistry ..lol

lgbasallote · Answer

your course is weird

lgbasallote · Answer

@UnkleRhaukus you're good in chemistry right?

anonymous · Answer

Do..u knw Fajans Rule...

anonymous · Answer

@lgbasallote

lgbasallote · Answer

no. what is it?

anonymous · Answer

Dipole moment (U)

anonymous · Answer

If polarity just depends upon difference of electronegativities of two atoms then C-O is the most polar, but there is another factorDipole moment (a vector like behaviour)

lgbasallote · Answer

ohhh that thing..yes im kind of familiar

lgbasallote · Answer

but i thought that vector thing was caused by electronegativities?

anonymous · Answer

If the atom is Polyatomic....we have to take its resultant....

unklerhaukus · Answer

Pauling electron negativities

C   2.55
O  3.44
Si   1.90

the dipole moment is due to a difference of electron negativities

unklerhaukus · Answer

oxygen is both pulling on the electrons with the most force

silicon is pulling on electrons least

carbon is in the middle

lgbasallote · Answer

so it's Si-O because O pulls harder there?

anonymous · Answer

Draw its Struc..@lgbasallote

lgbasallote · Answer

|dw:1346855605322:dw|
like that?