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Cs[Yb(NPPh 3 ) 4 ] – ein homoleptischer Phosphaniminato‐Komplex des Ytterbiums
Author(s) -
Gröb Thorsten,
Seybert Gert,
Massa Werner,
Dehnicke Kurt
Publication year - 2001
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200103)627:3<304::aid-zaac304>3.0.co;2-q
Subject(s) - homoleptic , ytterbium , crystallography , ion , crystal structure , caesium , molecule , chemistry , materials science , metal , inorganic chemistry , doping , organic chemistry , optoelectronics
Cs[Yb(NPPh 3 ) 4 ] – a Homoleptic Phosphoraneiminato Complex of Ytterbium Cesium tetrakis(phosphoraneiminato)ytterbate, Cs[Yb(NPPh 3 ) 4 ] ( 1 ) has been prepared by the reaction of the dimeric complex [Yb(NPPh 3 ) 3 ] 2 with CsNPPh 3 in thf solution. 1 crystallizes from thf solution to give colourless moisture sensitive crystals which contain three molecules thf per asymmetric unit. According to the crystal structure determination 1 forms a dimeric ion ensemble [Cs{Yb(NPPh 3 ) 4 }] 2 in which the Cs + ions connect the [Yb(NPPh 3 ) 4 ] – ions via Cs…N bridges. The ytterbium atoms are distorted tetrahedrally coordinated by the nitrogen atoms of the phosphoraneiminato ligands (NPPh 3 – ) with short Yb–N‐bond lengths between 212.1 and 221.9(8) pm. The included thf molecules are without bonding contacts with the complex. [Cs{Yb(NPPh 3 ) 4 }] 2 · 6 thf: Space group P 1, Z = 2, lattice dimensions at 193 K: a = 1837.2(2), b = 2041.5(2), c = 2095.8(2) pm, α = 79.953(13)°, β = 79.364(11)°, γ = 88.239(12)°, R = 0.0625.