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Synthesis and Crystal Structure Investigations of Trivalent Rare Earth (Y 3+ , Nd 3+ , Er 3+ ) Thienyl‐Substituted Methoxides
Author(s) -
Veith Michael,
Belot Céline,
Guyard Laurent,
Huch Volker,
Knorr Michael,
Zimmer Michael
Publication year - 2008
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.200701259
Subject(s) - chemistry , trigonal bipyramidal molecular geometry , toluene , crystal structure , octahedron , adduct , alkoxide , crystallography , metal , stereochemistry , medicinal chemistry , catalysis , organic chemistry
The synthesis and structural characterization of rare earth alkoxides with thiophene‐based substituents are presented. Monomeric metal thienylmethoxides have been prepared by aminolysis reactions between M[N(SiMe 3 ) 2 ] 3 (M = Y 3+ , Nd 3+ , Er 3+ ) and the structurally characterized tertiary alcohols HO–C(C 4 H 3 S) 3 ( 1 ) or HO–C(C 8 H 5 S 2 ) 3 ( 2 ). The metal alkoxide derivatives of these thiophene‐substituted alcohols have been isolated as air‐sensitive base adducts, their molecular structures being investigated by single‐crystal X‐ray crystallography. The coordination spheres around the metal centres are distorted trigonal‐bipyramidal for the yttrium thienylmethoxides Y[OC(C 4 H 3 S) 3 ] 3 (thf) 2 ( 3a ), {Y[OC(C 4 H 3 S) 3 ] 3 (thf) 2 } · toluene ( 3b ), Y[OC(C 4 H 3 S) 3 ] 3 (py) 2 ( 4a ), {Y[OC(C 4 H 3 S) 3 ] 3 (py) 2 } · toluene ( 4b ) and Y[OC(C 8 H 5 S 2 ) 3 ] 3 (thf) 2 ( 5 ). An almost tetrahedral geometry has been detected for Er[OC(C 8 H 5 S 2 ) 3 ] 3 (thf) ( 9 ), whereas an approximately octahedral geometry was found for {Nd[OC(C 4 H 3 S) 3 ] 3 (thf) 3 } · thf ( 6 ), {Nd[OC(C 8 H 5 S 2 ) 3 ] 3 (thf) 3 } · 4thf ( 7 ) and Er[OC(C 4 H 3 S) 3 ] 3 (thf) 3 ( 8 ). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)