Rigid trans-spanning triptycene-based ligands: How flexible they can be?

Clarite Azerraf, Olga Grossman, Dmitri Gelman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

trans-[1,8-Bis(diisopropylphosphino)triptycene]nickel (II) dichloride, trans-[1,8-bis(diisopropylphosphino)triptycene]carbonylrhodium (I) chloride and cis-[1,8-bis(diisopropyl-phosphino)triptycene] platinum (II) dichloride have been prepared and fully characterized in order to evaluate the coordination diversity of triptycene-based bidentate ligands. Their structural features and coordination preferences were studied and compared to the previously reported palladium complexes. The comparative structural analysis revealed that 1,8-bis(diisopropylphosphino)triptycene is able to access a variety of bite angles and to stabilize metal centers in different geometries. In addition, intramolecular weak C-H⋯Cl-Pt hydrogen bonding interactions which stabilize [1,8-bis(diisopropyl-phosphino)triptycene] platinum (II) dichloride in a constrained cis form are discussed.

Original languageAmerican English
Pages (from-to)761-767
Number of pages7
JournalJournal of Organometallic Chemistry
Volume692
Issue number4
DOIs
StatePublished - 15 Jan 2007

Bibliographical note

Funding Information:
This research was supported by The Israel Science Foundation (Grant No. 866/06). We also thank Dr. Shmuel Cohen for solving X-ray structures.

Keywords

  • Bidentate ligands
  • Intramolecular hydrogen bond
  • Transition metal complexes
  • Triptycene
  • trans-Spanning

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