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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
187 °C

Carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium was determined to decompose from approximately 187 °C with a possible melting temperature of 200 °C during this process. However, both thermal events may be sensitive to heating rate. Definitive reported temperatures have been taken from 1 °C/minute heating rate thermograms, in compliance with the specified method guidelines.

Conclusions:
Carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium was determined to decompose from approximately 187 °C with a possible melting temperature of 200 °C during this process. However, both thermal events may be sensitive to heating rate. Definitive reported temperatures have been taken from 1 °C/minute heating rate thermograms, in compliance with the specified method guidelines.
Executive summary:

This is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint.

Carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium was determined to decompose from approximately 187 °C with a possible melting temperature of 200 °C during this process. However, both thermal events may be sensitive to heating rate. Definitive reported temperatures have been taken from 1 °C/minute heating rate thermograms, in compliance with the specified method guidelines.

Description of key information

Carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium decomposes from approximately 187 °C with a possible melting temperature of 200 °C during this process.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
200 °C

Additional information

O'Connor and Woolley (2011) is a GLP compliant study following OECD TG 102 and is considered reliable and suitable for use as the key study for this endpoint.

Carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium was determined to decompose from approximately 187 °C with a possible melting temperature of 200 °C during this process. However, both thermal events may be sensitive to heating rate. Definitive reported temperatures have been taken from 1 °C/minute heating rate thermograms, in compliance with the specified method guidelines.