Di-μ-olato dinuclear copper(II) compounds. The structure of Bis-μ-O-[(4,6,6-trimethyl-9-(pyridin-2-yl)-3,7-diazanon-3-en-1-olato)copper(II)] perchlorate

Neil F Curtis, Olga P Gladkikh, Keith R Morgan, Sarah L Heath

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Prepns. are reported for blue-green [{Cu(pyen)(eto)}2](ClO4)2 [pyen is 2-(2-aminoethyl)pyridine, eto- is deprotonated 2-aminoethanol] and of green [{Cu(pyaceto)}2](ClO4)2, formed by reaction of this compd. with acetone [pyaceto- is deprotonated 4,6,6-trimethyl-9-(pyridin-2-yl)-3,7-diazanon-3-en-1-ol]. The structure of [{Cu(pyaceto)}2](ClO4)2 shows a unit cell contg. two independent, but closely similar, centrosym. dinuclear diolato-bridged cations. The Cu(II) ions are in square pyramidal coordination, with the two bridging O atoms, and the imine and secondary amine N atoms in the basal plane, with the pyridine N atom more weakly coordinated axially. Mean dimensions for the two cations are Cu-Cu# 2.99, Cu-Nbasal 2.01, Cu-O 1.96, Cu-Naxial 2.24 Å, O-Cu-O# 99, Cu-O-Cu# 81, C-O-Cu 110, C-O-Cu# 130° [C30H46Cl2Cu2N6O10, monoclinic, space group P21/n, a 13.487(1), b 13.356(1), c 20.921(2) Å, β 103.235(3)°, R1 = 0.0516 for 4694 reflections]. Magnetic susceptibilities (100-300 K) show antiferromagnetic spin coupling for [{Cu(pyaceto)}2](ClO4)2 and [{Cu(pyen)(eto)}2](ClO4)2 with singlet-triplet level sepn. J of -110(10) and -65(10) cm-1, resp., indicating that [{Cu(pyen)(eto)}2](ClO4)2 also has a dinuclear structure. [on SciFinder(R)]
    Original languageEnglish
    Pages (from-to)673-678
    Number of pages6
    JournalAust. J. Chem.
    Volume53
    Issue number8
    DOIs
    Publication statusPublished - 2000

    Keywords

    • crystal structure copper pyridinyldiazanonenolato dinuclear complex
    • copper aminoethylpyridine aminoethanolato pyridinyldiazanonenolato dinuclear complex prepn
    • aminoethylpyridine aminoethanolato copper dinuclear complex prepn
    • pyridinyldiazanonenolato copper dinuclear complex prepn
    • antiferromagnetic spin coupling copper aminoethylpyridine aminoethanolato pyridinyldiazanonenolato complex
    • hydrogen bonding copper pyridinyldiazanonenolato dinuclear complex

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