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Aurophilic towards H‐Bonding Interactions in Phosphine‐pyrazolato‐gold(I) Complexes: Luminescence Studies and Crystal Structure of {3,5‐Bis[4‐(octyloxy)phenyl]‐1 H ‐pyrazolato‐ κN 1 }(triphenylphosphine)gold{3,5‐Bis[4‐(octyloxy)phenyl]‐1 H ‐pyrazole} ([Au(pz op 2 )(PPh 3 )]⋅(Hpz op 2 ))
Author(s) -
Ovejero Paloma,
Cano Mercedes,
Campo José A.,
Heras José V.,
Laguna Antonio,
Crespo Olga,
Pinilla Elena,
Torres M. Rosario
Publication year - 2004
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200490184
Subject(s) - chemistry , phosphine , dimer , luminescence , crystallography , monomer , pyrazole , crystal structure , crystallization , ligand (biochemistry) , stereochemistry , organic chemistry , polymer , biochemistry , physics , receptor , optoelectronics , catalysis
Compounds [{Au(pz R 2)(PPh 3 )} 2 ] (pz R 2=3,5‐disubstituted pyrazolato; R=BuOC 6 H 4 (bp), 1 ; R=C 8 H 17 OC 6 H 4 (op), 2 ; R=C 6 H 13 OC 6 H 4 (hp), 3 ) were easily obtained by reaction of [Au(NO 3 )(PPh 3 )] and the corresponding pyrazolato ligand. They exhibit similar NMR patterns, their ESI‐MS or FAB‐MS data being in agreement with a monomeric molecular formulation [Au(pz R 2)(PPh 3 )]. By contrast, 1 crystallizes as the dimer [{Au(pz R 2)(PPh 3 )} 2 ] and exhibits aurophilic Au ⋅⋅⋅Au contacts, while crystallization of 2 in CH 2 Cl 2 /hexane gives rise to compound 4 , [Au(pz op 2)(PPh 3 )]⋅(Hpz op 2). The X‐ray structure of 4 was solved, showing a H‐bond interaction between the monomer of 2 and Hpz op 2. Reactions between [{Au(pz R 2)(PPh 3 )} 2 ] and their corresponding 1 H ‐pyrazole (Hpz R 2) were also explored. Compounds 1 – 3 exhibit luminescence in the solid state. Their emission spectra are reported and analyzed.