Formation, crystal and molecular structures of heteroleptic zinc(II) tri-tert-butoxysilanethiolates with ZnNO2S2 and ZnN2S2 coordination pattern

Synthesis, spectroscopy and crystal structure determination of heteroleptic cobalt(II) silanethiolates with pyridine derivatives

“…In this range, the spectra contain at least two superimposed bands with varying intensities. In metal silanethiolates, where oxygen from the Si-O-t Bu residue interacts with the metal center, a broad band is observed at about a 980 cm -1 [21][22][23][24][25] (Figs. 8, 9), whereas the spectra of tetrahedral complexes (2) and (4) do not have a characteristic band for O to metal chelating, and only strong asymmetric m (Si-O-C) bands are present at about 1,010 cm -1 .…”

“…The location of the methyl group on the pyridyl ring does not strongly affect the Co-N, Co-S and Si-S bond lengths, which are in the range of those present in other Co(II) and Zn(II) silanethiolates [15,[20][21][22][23][24]. It also does not influence significantly the S(1)-Co(1)-S(2), S(1)-Co(1)-N(1) and S(2)-Co(1)-N(1) angles, which deviate from the ideal 120°, but their sum is very close to 360°(359.99°in both complexes).…”

“…For many years, we have been involved in the synthesis of metal silanethiolates with tri-tert-butoxysilanethiol ( t BuO) 3 SiSH as a thiolate ligand [16][17][18][19][20][21][22][23][24][25][26][27][28]. This compound contains a Si-S bond and bulky tri-tert-butoxyl residues, which provide steric hindrance on the sulfur atom, so protecting the silanethiol against hydrolysis.…”

The first manganese trialkoxysilanethiolates: Formation, properties and structure of solvent ligated complexes – [Mn{SSi(OBut)3}2(MeCN)] and [Mn{SSi(OBut)3}2(MeOH)4]

“…They are potential sources of sulfide materials [1], some are used as catalysts [2], and many gained wide interest because of their relevance to the active centers of cysteine rich metaloproteins [3]. Metal thiolates are also the subject of our studies [4], however, our approach may be regarded as somewhat nonclassical since we mainly use trialkoxysilanethiols -(RO) 3 SiSH, as the source of thiolate ligands.Recently we devoted special attention to the silanethiolates of zinc and cobalt, because of our interest (at least in part) in structural modeling of some Zn-based enzymatic active centers [4,5]. Many enzymes contain zinc, and factors responsible for the properties of their active sites are investigated by several research groups with the help of suitable model compounds, crystallographic and spectroscopic methods and by means of metal substitution [3].…”

“…Recently we devoted special attention to the silanethiolates of zinc and cobalt, because of our interest (at least in part) in structural modeling of some Zn-based enzymatic active centers [4,5]. Many enzymes contain zinc, and factors responsible for the properties of their active sites are investigated by several research groups with the help of suitable model compounds, crystallographic and spectroscopic methods and by means of metal substitution [3].…”