How Can I Grow Crystals of My Platinum Complexes?

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Discussion Overview

The discussion revolves around the challenges of growing crystals from platinum(II) complexes, specifically derivatives of cisplatin. Participants explore the solubility of these complexes in various solvents and seek effective methods for crystallization.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant describes their attempts to grow crystals from platinum(II) complexes, noting poor solubility in water and good solubility in DMF, which did not yield crystals.
  • Another participant questions the specifics of the solubility issues encountered with DMF and acetonitrile, asking whether the complexes decomposed or formed an amorphous gel.
  • This second participant suggests exploring a wider range of solvents, including DMSO, methanol, hexane, acetone, dimethylether, dichloromethane, and chloroform, as potential alternatives for recrystallization.
  • Additional suggestions for recrystallization methods are offered, pending more information about the initial attempts.
  • Links to external resources providing tips for selecting solvents for crystallization are shared by another participant.
  • A mention of two recently developed methods for crystallization of platinum complexes is made, though details are not elaborated upon in the discussion.

Areas of Agreement / Disagreement

Participants express differing views on the effectiveness of specific solvents and methods for crystallization, indicating that the discussion remains unresolved regarding the best approach to grow crystals from the platinum complexes.

Contextual Notes

Limitations include a lack of detailed information on the specific outcomes of previous attempts with various solvents and the potential need for additional experimental methods.

KarolinaPL
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Hi! i prepare different platinum(II) complexes, derivatves of cisplatin, where one or two ammine ligands are substituted by bulky hydrophobc amine... i would like to grow crystals, but i have a problem with it... the solvent... they are usually poor soluble in water, good soluble in e.g. DMF... but DMF didnt work for crystals. In similar case, they used acetonitrile, i tried as well, it didnt work...
 
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KarolinaPL said:
Hi! i prepare different platinum(II) complexes, derivatves of cisplatin, where one or two ammine ligands are substituted by bulky hydrophobc amine... i would like to grow crystals, but i have a problem with it... the solvent... they are usually poor soluble in water, good soluble in e.g. DMF... but DMF didnt work for crystals. In similar case, they used acetonitrile, i tried as well, it didnt work...

How, specifically, did those soluble solvents not work? Did the molecule decompose? Did it become some amorphous gel? Are DMF and acetonitrile the only solvent you have tried? Typically, searching for solvents for recrystallization require you to try out all the available solvents. DMSO, methanol, hexane, acetone, dimethylether, dichloromethane, chloroform, etc. There are lots of other solvents out there. If these relatively safe solvents don't work, try toluene, benzene, pyridine, etc.I can also suggest you several recrystallization methods you can try, but I would like to know above information first.
 

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