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Original Articles

The Synthesis and Structure of Tris [2-(1,4-diisopropylimidazolyl)]phosphine Zinc Nitrate, [PimPri2]Zn(NO3)2: Structural Consequences of t-Butyl versus Isopropyl Substitution in Tris (imidazolyl) phosphine Zinc Complexes

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Pages 297-300 | Received 11 Oct 1995, Published online: 16 Aug 2006

References

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  • Abbreviations: tris(2-imidazolyl)phosphines are represented by the abbreviation [PimR,R′], with the 1- and 4-alkyl substituents listed respectively as superscripts; tris(1-pyrazolyl)hydroborato ligands are represented by the abbreviation [TpRR′], with the 3- and 5-alkyl substituents listed respectively as superscripts
  • Kimblin , C. , Allen , W. E. and Parkin , G. 1995 . J. Chem. Soc., Commun. , : 1813 – 1815 .
  • Zvargulis , E. S. , Buys , I. E. and Hambley , T. W. 1995 . Polyhedron , 14 : 2267 – 2273 .
  • Astley , T. , Gulbis , J. M. , Hitchman , M. A. and Tiekink , E. R. T. 1993 . J. Chem. Soc., Dalton Trans. , : 509 – 515 . For an additional synthesis of {[η3-HC(pz)3]2Zn}2+, see:
  • Looney , A. , Han , R. , Gorrell , I. B. , Cornebise , M. , Yoon , K. , Parkin , G. and Rheingold , A. L. 1995 . Organometallics , 14 : 274 – 288 . Furthermore, six-coordinate sandwich complexes have also been obtained with related ligand systems, namely [TpMe2] Zn,6a{η3-P(py)3]2Zn}(C1O4)2,6b {[η3-MeC(CH2NMe)3]2Zn}-(C1O4)2,6c and {[η3-HC(pz)2(py)]2Zn}(NO3)2,6d
  • Gregorzik , R. , Wirbser , J. and Vahrenkamp , H. 1992 . Chem. Ber. , 125 : 1575 – 1581 .
  • Brandt , W. , Wirbser , J. , Powell , A. K. and Vahrenkamp , H. Z. 1991 . Naturforsch. , 46B : 440 – 448 .
  • Astley , T. , Canty , A. J. , Hitchman , M. A. , Rowbottom , G. L. , Skelton , B. W. and White , A. H. 1991 . J. Chem. Soc., Dalton Trans. , : 1981 – 1990 .
  • Titze , C. , Hermann , J. and Vahrenkamp , H. 1995 . Chem. Ber. , 128 : 1095 – 1103 .
  • Lynch , W. E. , Kurtz , D. M. Jr. , Wang , S. and Scott , R. A. 1994 . J. Am. Chem. Soc. , 116 : 11030 – 11038 . For related tris(imidazolyl)phosphine ligands with isopropyl groups in the 4-position, see:
  • Brown , R. S. , Curtis , N. J. and Huguet , J. 1981 . J. Am. Chem. Soc. , 103 : 6953 – 6959 .
  • Slebocka-Tilk , H. , Cocho , J. L. , Frakman , Z. and Brown , R. S. 1984 . J. Am. Chem. Soc. , 106 : 2421 – 2431 .
  • Curtis , N. J. and Brown , R. S. 1980 . J. Org. Chem. , 45 : 4038 – 4040 .
  • [PimPri 2 ]Zn(No3)2 is orthorhombic, Pbca (No.61), a = 18.870(4) Å, b = 17.273(7)Å, c = 20.641(4)Å, V = 6758(3)Å, Z = 8.
  • Kleywegt , G. J. , Wiesmeijer , W. G. R. , Van Driel , G. J. , Driessen , W. L. , Reedijk , J. and Noordik , J. H. 1985 . J. Chem. Soc., Dalton Trans. , : 2177 – 2184 . The nitrate ligand coordination mode is classified as bidentate, anisobidentate, or unidentate, according to the degree of asymmetry of the interaction. For definitions, see:
  • Dowling , C. , Murphy , V. J. and Parkin , G. in press . Inorg. Chem. , , and references therein. For further examples of bis(nitrate) zinc complexes see:
  • In contrast, the Zn[sbnd]N bond lengths in {[PimPri,But ]Zn(NO3)}(NO3)[2.054(4)Å, 2.074(3)Å, and 2.048(3)Å]12a are similar to each other and comparable ot those in {Pim p1 2 }ZnC1} {C1}[2.057(2)Å], a derivative of the isomeric tris-(4,5 diisopropylimidazolyl)]phoshine ligand.12b (a)Reference 3
  • Read , R. J. and James , M. N. G. 1981 . J. Am. Chem. Soc. , 103 : 6947 – 6952 .
  • Looney , A. , Han , R. , McNeill , K. and Parkin , G. 1993 . J. Am. Chem. Soc. , 115 : 4690 – 4697 . See, for example:
  • Kitajima , N. , Hikichi , S. , Tanaka , M. and Moro-oka , Y. 1993 . J. Am. Chem. Soc. , 115 : 5496 – 5508 .
  • Parkin , G. 1995 . Adv. Inorg. Chem. , 42 : 291 – 393 .
  • Looney , A. and Parkin , G. 1994 . Inorg. Chem. , 33 : 1234 – 1237 .

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