Question
(a)Molybdenum oxyfluoride salts of L-histidine and DL-histidine (zwitterionic form shown below) were investigated through single crystal X-ray diffraction. The following results were obtained for each
(a)Molybdenum oxyfluoride salts of L-histidine and DL-histidine (zwitterionic form shown below) were investigated through single crystal X-ray diffraction. The following results were obtained for each sample. Identify which sample contains L-histidine and which DL-histidine. Systematic absence rules are given in Appendix 3.
molybdenum oxyfluoride anion
Histidine
Sample | Unit Cell Parameters | V (3), r (g cm-3), Z, | Observed |
|
(a, b, c/, a, b, g/)
| Z | Absences |
| |
|
| |||
|
|
|
|
|
| 9.871, 8.206, 14.113, |
| (h0l) h+k = |
|
1 | 1109.3, 2.162, 4, 1 | odd |
| |
90.0, 103.98, 90.0 |
| |||
|
| (0k0) k = odd |
| |
|
|
|
| |
|
|
|
|
|
2 | 8.101, 8.447, 14.100, | 871.05, 2.10, 1, 1 | None |
|
78.16, 86.26, 67.29 |
| |||
|
|
|
| |
|
|
|
|
|
|
|
| (3 marks) |
|
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started