15-02-09 Is this carbon Chiral or Achiral?

Is the central carbon on this chiral or achiral

How many chiral centers are there on the whole structure?

25 Answers

1
voldy ·

now see the diag does it matter whether the relative positions of the methyls which you've indicated ? hopefully I'm not wrong .

1
voldy ·

the central carbon is achiral but the molecule is chiral.
hopefully this makes it clear.

1
mkagenius ·

is 2nd one having a center of symmetry????

i think it is having...

1
voldy ·

no the moleucule cannot ahve a centre of symmetry .

it's chiral whatever you do try superimpoesing it's mirro image

1
mkagenius ·

am i correct?????

1
mkagenius ·

the second molecule by priyam has center of symmetry
so it sud b optically INACTIVE so the molecule's central carbon sud b
achiral.

1
voldy ·

oh sorry guys realised my mistake .

the Q was whether the central carbon is chiral or not . answer is no . but molecule is chiral . sorry for creating confusion . sorry [2][2][2][2]

1
voldy ·

the above one is an example.

1
voldy ·

chiral molecules are always optically active .

and a chiral centre is not a necesstiy for a chiral molecule.

1
mkagenius ·

is it necessary that chiral or achiral molecule will b optically active?

1
mkagenius ·

ur post no 14 is surely correct....

1
voldy ·

it's a spiro alkane no that's why I thought so correct me if I'm wrong.

1
mkagenius ·

first molecule is achiral...drawn by priyam...so it sud b optically active...??

106
Asish Mahapatra ·

there are two chiral centres in the whole structure..................( i think)

1
voldy ·

no . the molecule is chiral remember that the carbon is like the one shown in daig . always think 3-D .

1
mkagenius ·

will there b any optical activity due to carbon no. 1????

62
Lokesh Verma ·

:)

yup good hai... :)

Inorganic bhee mat bhoolna ;)

33
Abhishek Priyam ·

heheh.. i am studying chemistry.. [4]

62
Lokesh Verma ·

great one priyam :)

33
Abhishek Priyam ·

106
Asish Mahapatra ·

is this because the symmetry depends on 3-d structure?

62
Lokesh Verma ·

but why mkagenius?

1
mkagenius ·

cant say without the 3d representation??

62
Lokesh Verma ·

2 and 4 are chiral.. No doubt.

What about 1?

106
Asish Mahapatra ·


if you go from any position there is always another identical way as shown by 1,2,3,4. Therefore central carbon is achiral. but the other carbons indicated by diag. are chiral

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