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Aryl Germanes as Ligands for Transition Polymetallic Complexes: Synthesis, Structure, and Properties
Author(s) -
Zaitsev Kirill V.,
Lam Kevin,
Poleshchuk Oleg Kh.,
Bezzubov Stanislav I.,
Churakov Andrei V.
Publication year - 2019
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.201900316
Subject(s) - chemistry , thermal decomposition , transition metal , aryl , crystallography , crystal structure , ligand (biochemistry) , x ray crystallography , electrochemistry , chromium , infrared spectroscopy , medicinal chemistry , stereochemistry , inorganic chemistry , diffraction , catalysis , organic chemistry , biochemistry , alkyl , receptor , physics , electrode , optics
A series of new carbonyl dichromium complexes bearing aryl germanes as ligands were prepared using improved approaches. The thermal reaction of Cr(CO) 6 ( 1 ) with Me 3 GeGePh 3 ( 3 ) led to the formation of Me 3 GeGePh[(η 6 ‐C 6 H 5 )Cr(CO) 3 ] 2 ( 3a ). The lithiation of [(η 6 ‐C 6 H 6 )Cr(CO) 3 ] ( 2 ) with n BuLi followed by the addition of Me 2 GeCl 2 ( 4 ) or ClGeMe 2 GeMe 2 Cl ( 5 ) gave Me 2 Ge[(η 6 ‐C 6 H 5 )Cr(CO) 3 ] 2 ( 4a ) and [(OC) 3 Cr(η 6 ‐C 6 H 5 )]GeMe 2 GeMe 2 [(η 6 ‐C 6 H 5 )Cr(CO) 3 ] ( 5a ), respectively. The molecular structures of 3a and 4a , in their crystal forms, were studied by X‐ray diffraction analysis. The crystals of oligogermane 3a have shown to undergo a fully reversible phase transition at 160 K without any sign of decomposition. The complexes synthesized were also studied by multinuclear NMR, IR and UV/Vis spectroscopy, DFT calculations and electrochemistry. The presence of a Cr(CO) 3 group in a range of oligogermanes has shown to impact on the physical and chemical properties of the compounds.