Refractive index of Vanillin and p-bromobenzophenone

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Discussion Overview

The discussion revolves around the refractive index of vanillin and p-bromobenzophenone, specifically in the context of an organic chemistry assignment. Participants seek reliable sources for this information and discuss the variability of refractive index with temperature.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant mentions finding the refractive index of vanillin as 1.555 but notes that it varies with temperature and seeks the specific temperature for this value.
  • Another participant suggests consulting the CRC Handbook for the refractive index information.
  • A later reply indicates that the CRC Handbook only provided information on dibromobenzophenone, not p-bromobenzophenone.
  • One participant proposes that it might be safe to assume a temperature of 25°C for the refractive index of vanillin.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the refractive index values or the appropriate temperature for measurement, and multiple competing views regarding sources and specific data remain unresolved.

Contextual Notes

The discussion highlights limitations in available resources and the need for specific temperature conditions when discussing refractive indices.

shad0w0f3vil
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Hi,

I have an organic chemistry assignment identifying an unknown sample. My tutor has asked for the properties (I can find all but refractive index) for vanillin and p-bromobenzophenone.

I found that for Vanillin it is 1.555 but I know that it changes with temperature and I cannot find a temperature for this reading.

I was just wondering if anyone knows a good website or has a good chemistry textbook lying around with this information (I couldn't find it in the VOGEL text...)

Kind regards,
 
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shad0w0f3vil said:
Hi,

I have an organic chemistry assignment identifying an unknown sample. My tutor has asked for the properties (I can find all but refractive index) for vanillin and p-bromobenzophenone.

I found that for Vanillin it is 1.555 but I know that it changes with temperature and I cannot find a temperature for this reading.

I was just wondering if anyone knows a good website or has a good chemistry textbook lying around with this information (I couldn't find it in the VOGEL text...)

Kind regards,

Try the CRC Handbook
 
gabriels-horn said:
Try the CRC Handbook

I downloaded the handbook and only found dibromobenzophenone.

Any other ideas please?
 
shad0w0f3vil said:
I downloaded the handbook and only found dibromobenzophenone.

Any other ideas please?

Where do you download the CRC handbook?
 
I found that for Vanillin it is 1.555 but I know that it changes with temperature and I cannot find a temperature for this reading.

Probably safe to assume 25C.
 

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