Diborane Video Lecture | Chemistry for JEE Main & Advanced

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to talk about the another compound
called dying brain so as I told board is
nothing but the hydrides of burrow right
and this die born is nothing a simplest
hide right up good this is v2 s 6c it
has to be BSE but BSC is not stable
because this one is hungry up electrons
so you form this time a shape similar to
a sv r3 and for me to h6 this is the
shape of diborane
right this is the angle - I'm going to
be this one really is 130 when you come
into the length and this BH length is 1
190 go alright it is colorless it's very
small smelling it's very toxic gas and
what do you find out 180 kill rates very
low boiling kinds of colorless all
smelling tops you see this is it not
forming a very complex schedule a
structure I say no it's just a BH three
molecule is this is the stand around
molecule for this and it is not having
anything is to form the hydrogen bond
alright there's no case like structure
that's why you see this gas type you saw
the boric acid in body as if you see voh
again it was forming a hydrogen bond
under another buuck as you see this was
born here the other bond here actually
the body gets it there was a big key
like structure sweetness solid in this
case there is no key like stuff is just
a non molecule for diborane so it is
colorless toxic gas this is gas actually
that's very thin this gas toxic is
because some other reason because it
forms compound with the blood but this
gap because it is not a complex
structure hope you understand that point
and it catches fire easily when it's
exposed to at the moment b-2s it reacts
with water it gets me to because I told
it's very very unstable very unstable
right and it is readily hydrolyzed also
hydrolyzed
what I don't hydrolyze hidroméis water
that miss reaction with water
hydrolases itself means reaction water
so you have B two S's diaper and you
react with water it forms the os3 boron
hydroxides and gives light hydrogen gas
this is nothing but boric asked so the
moment I wouldn't react with water it
gives boric acid so you want to prepare
a body cast we can do with the diaper
itself we have a diaper and just
hydrolyze with water and you get good it
yes it also reacts with alkali to form
meta boards and hydrogen gases let me
write the reaction for us let's take
this die boring let's react with alkali
satellite and it is it has to be act
that is potassium meta borate and I were
to give hydroxyl yes correct
this is my die boring it reacts with
alkali you give potassium beta and
hydroxyl yes what I don't hydrogen gas
and they again balance this yes you want
this has to be dashing right this has to
be molecule and this will be this will
be six this is valid stop let's study
more on dipole ends now this boron
reacts with alkali metal hydrides to
form metal tetra hydro borates for metal
borohydride so this is the reaction if
you see this is what it forms a li b h4
nabh4 so this is my boring diborane this
reacts with metal hydrides for example
sodium hydride she gives nabh4
nabh4 is nothing but by you can say that
is borohydride this sodium borohydride
well you can say this sodium tetra hydro
boots these borohydride which we have
got are very good reducing agents in
that's why we are reading this reaction
because these are very critical you see
burn also reacts with hydrogen to form
higher the Marines and they reaction
will be to s6 if you react with chlorine
becomes me
by CL this is the reaction this is the
replacement reaction a clear example
this guy you have way so we have four
hydrogen molecules and react with
chlorine one with chlorine will be able
to play the hydrogen this you get this
made up burn also reacts with ammonia to
give different products example this is
a vibrant b2 s6 hey you react with the
ammonia you get this compound the moment
you hit it further you get this compound
so you different products based on the
amount of lead you apply the burden also
the goal the Cleary's reaction and to
form attacks what is addict's attack is
nothing but two molecules with this
combined example in this case B to h6
and this guy it reacted to form vs 3 and
n 3 so I'm going to be to s6 reacted
with carbon monoxide and get vs 3 & 0
the attack is nothing but 2 element just
combine right so so this is Tyburn
undergoes cleavage reactions with levels
base these are mine there is B because
they will donate electron pair right
lemon essence or nothing but the one
which accepts electron to it and the
device this is nothing but the one which
donates electrons these guys never come
reset has extra electrons oxygen if you
see they even ready to donate electrons
and the vigor and reacts only with
please note
devious bases and undergoes cleavage
reaction because these guys hungry
it is hungry the boron is a hungry guy
and this very is the sweeter
this guy has extra electron so hungry
and sweet are combined they form the
addict that is guy hunger if there is a
feeder they combine to form all right so
let's talk about the preparation of
diborane we talked a lot about fiber
let's talk about the preparation of a
world so it is prepared by reading
leaking DTMF medium hydride in diethyl
ether so this reaction we have covered
some time in the past itself we have
this bf3 one try to write you react with
lithium aluminum hydride with ether you
get B to a 6 this is nothing but my die
break the shape of the I already must be
family with the shape of the bye now
in the lab if you want to prepare this
diaper it you can take this sodium
borohydride and react with iodine iodine
we get this is the reparation for rain
in the industry if you want you have to
prepare the last scale so what you can
do is you can react this again this
sodium borohydrate instead of using
youth email you might have discussed you
can use sodium hydride then use 50
Kelvin temperature you will get this
type rate these are two different
reparation for sodium black liberation
in them in the strip with reaching for
die for you let's talk about the uses of
diaper in now the first is just rocket
propellant they told in the initial
slide is used for the rubber of
percolation the key block element so
this is the boron which is diborane
actually can say which is used for the
rubber vulcanizer
it is also used as a catalyst to form
hydrocarbon polymerization you see your
hydrocarbon forms the large changes in
cognition right so this is used as a
catalyst active I put it there and it
also uses doping agent for
semiconductors and semiconductor we need
something called doping agent you learn
more about it open it says this charcoal
this is used as a go peeing agent meters
let's talk about a different important
component of below that is boron drying
halides
so if you see these are my planar if you
see the structure being a plane line
structure right sp2 hybridization all
planar instruction and they act as
latest asset by because this very is a
hungry electron hungry because electron
hungry because it has only six electrons
the electron hungry electron hungry
hold on so it act as the Levis s it so
it reacts with ammonia with the Levis
base to form this bond right and the
reactivity series for this is bf3 is
least reactive and we talked about this
because this is the back donation by
fluorine to drum booming because
chlorine gives electron
becomes happy and it is since it is
happy doesn't behave as a strong latest
essay but vr3 vomit is not giving much
bromine is not hearing much electron to
boron this boron is unhappy is the good
as I said we discuss about this we talk
about the back bonding right of the
electron donation so if you if you have
doubt you can just watch that between
the same chart today we talked about why
the stick character be in this fashion
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