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Air‐Stable and Volatile Bis(pyridylalkenolato)germanium(II), ‐tin(II), and ‐lead(II) Complexes
Author(s) -
Heidemann Tim,
Mathur Sanjay
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301054
Subject(s) - chemistry , homoleptic , tin , germanium , crystallography , denticity , lone pair , trigonal bipyramidal molecular geometry , antimony , crystal structure , ligand (biochemistry) , pyridine , metal , pentagonal bipyramidal molecular geometry , nuclear magnetic resonance spectroscopy , stereochemistry , molecule , inorganic chemistry , medicinal chemistry , silicon , organic chemistry , biochemistry , receptor
Homoleptic germanium(II), tin(II), and lead(II) complexes of the general formula M(2‐PyCHCOCF 3 ) 2 (M = Ge, Sn, Pb; Py = pyridine) were synthesized by treating the corresponding silyl amides [M{N(SiMe 3 ) 2 } 2 ] with two equivalents of a 3,3,3‐trifluoro‐1‐(2‐pyridyl)prop‐1‐en‐2‐ol (2‐PyCHCOHCF 3 ) ligand. Single‐crystal X‐ray diffraction revealed the bidentate chelation of 2‐PyCHCOHCF 3 , which imposes a distorted trigonal bipyramidal geometry for all three molecular structures; this distortion is highest for the lead compound, probably as a result of the high s character of the lone pair of electrons present on the metal centers. The monomeric nature of the compounds in solution was confirmed by multinuclear NMR spectroscopy, whereas a polymeric structure is observed for the lead complex in the solid state.