Structure of Dinitrosyl(1,2-bis(diphenylphosphino)ethane)cobalt Hexafluorophosphate, [Co(NO)2((C6H5)2PC2H4P(C6H5)2)][PF6]

James A. Kaduk, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The structure of dinitrosyl(1,2-bis(diphenylphosphino)ethane)cobalt hexafluorophosphate, [Co(NO)2((C6H5)2PC2H4P-(C6H5)2][PF6], has been determined from three-dimensional x-ray data. The compound crystallizes in the space group Cs4-Cc with four molecules in a unit cell of dimensions a = 13.510 (8) Å, b = 17.075 (9) Å, c = 13.532 (7) Å, and ß = 115.42 (2)°. Least-squares refinement of the 191 variables has led to the value of the conventional R index (on F) of 0.068 for the 2663 independent reflections for which Fo2> 3σ(Fo2). The complex may be described as a tetrahedral Co(-I) complex of approximate C2v symmetry. Structural parameters: Co-P(1) = 2.249 (3), Co-P(2) = 2.244 (3), Co-N(1) = 1.656 (10), Co-N(2) = 1,671 (11) Å; P(1)-Co-P(2) = 87.87 (9), N(1)-Co-N(2) = 131.7 (5), Co-N(1)-O(1) = 176.6 (14), Co-N(2)-O(2) = 172.3 (11)°. The angle between the Co(NO)2 and CoP2 planes is 92°. Comparisons are made between the structures and infrared and visible spectra of the title compound, [Co(NO)2(PPh3)2][PF6], and Co(NO)2(SacSac). These structures generally conform to the trends previously observed in M(NO)2L2 complexes, and the partial success of molecular orbital theory in rationalizing these trends is discussed.

Original languageEnglish (US)
Pages (from-to)3283-3287
Number of pages5
JournalInorganic chemistry
Issue number12
StatePublished - Dec 1 1977

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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