Zn-OH2 and Zn-OH complexes with hydroborate-derived tripod ligands: a comprehensive study.
The complete array of those hydrotris(pyrazolyl/thioimidazolyl)borate ligands that were developed and used in the author's laboratories, with N3, N2S, NS2, and S3 donor sets, was scanned for their ability to form Zn-OH2 and Zn-OH complexes. The coordination motifs found were Zn-OH2, Zn-OH, Zn-OH-Zn, and Zn-O2H3-Zn. Of these, the well-established Zn-OH motif was complemented with novel species bearing N3, NS2, and S3 tripods. The Zn-OH2 motif was observed only with pyrazolylborate ligands and only in unusual situations with coordination numbers higher than 4 for zinc. The new Zn-OH-Zn motif was realized for three different pyrazolylborates, for one NS2 tripod, and for two S3 tripods. Finally, it was verified that the Zn-O2H3-Zn motif again occurs only with pyrazolylborate ligands. The new complexes were identified by a total of 11 structure determinations.
Ibrahim
Mohamed M
MM
Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany.
Olmo
Cristina Pérez
CP
Tekeste
Teame
T
Seebacher
Jan
J
He
Guosen
G
Maldonado Calvo
José A
JA
Böhmerle
Karin
K
Steinfeld
Gunther
G
Brombacher
Horst
H
Vahrenkamp
Heinrich
H
D001881:Borates / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D006878:Hydroxides / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*; D013237:Stereoisomerism; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D001881:Borates; D006878:Hydroxides; D007093:Imidazoles; D008024:Ligands; D009942:Organometallic Compounds; D011720:Pyrazoles; D013438:Sulfhydryl Compounds; D017967:Zinc Compounds; C052745:zinc hydroxide