The reaction between two equivalents of dimethyl
N
-cyanodithioiminocarbonate, (MeS)
2
C=N–C≡N (
1
), one equivalent of
n
-butyltin trichloride, Sn(
n
-Bu)Cl
3
and one equivalent of sodium hydroxide, ...NaOH led to isolation of a dinuclear complex {Sn(
n
-Bu)Cl
2
(OH)(H
2
O)
2
} (
2
) which co-crystallized with four (MeS)
2
C=N–C≡N molecules, {Sn(
n
-Bu)Cl
2
(OH)(H
2
O)
2
(CH
3
S)
2
C=N–C≡N
4
} (
3
). The compound was investigated by single-crystal X-ray diffraction analysis and infrared spectroscopy. Compound
3
crystallizes in the triclinic space group
P
1
¯
with
a
= 9.8208(15),
b
= 11.2664(17),
c
= 12.0446(18) Å,
α
= 106.236(5),
β
= 111.510(5),
γ
= 97.710(6)°,
V
= 1147.9(3) Å
3
,
Z
= 1 and Z′ = 0.5. In the complex, two aqua-
n
-butyltinhydroxide dichloride moieties, Sn(
n
-Bu)Cl
2
(OH)(H
2
O), are bridged by the hydroxides. The hydroxide bridges bond lengths describe a static
trans
effect yielding a dissymmetry in Sn–O bonding. Two inner O2–H2D⋯Cl1 hydrogen bonds strengthen the dinuclear component. The dimethyl
N
-cyanodithioiminocarbonate molecules are linked to the dinuclear component through the hydroxide bridges and the water molecules by O1–H1⋯N2A and O2–H2C⋯N2B hydrogen bonding patterns of D type, respectively. The (MeS)
2
C=N–C≡N molecules exhibit a positional disorder. These hydrogen bonding interactions lead to cyclic patterns generating
R
1
1
(6) and
R
2
2
(8) rings. Additional C–H⋯Cl and C–H⋯N hydrogen bond patterns also contribute to the crystal structure framework: they give rise to a 3D structure.
Graphical Abstract
Reacting with
n
-BuSnCl
3
and NaOH in an aqueous mixed solvent, dimethyl
N
-cyanodithioiminocarbonate, (MeS)
2
C=N–C≡N forms a co-crystalline 4:1 assembly with the bimetallic organotin(IV) complex, Sn(
n
-Bu)Cl
2
(OH)(H
2
O)
2
, whose single crystal XRD analysis exhibits a 3D hydrogen bonded structure.
Three types of ladder-like organostannoxanes, C
N(
-CO
)
Bu
Sn
-O)
-OH)
(
), Ph
CHCO
Bu
Sn
-O)
(
), and (
-NH
)-C
-CO
Bu
Sn
-O)
-OH)
(
), have been synthesized and characterized using elemental ...analyses, Fourier-transform infrared spectroscopy, nuclear magnetic resonance (
H,
C) experiments, and, for
and
, single-crystal X-ray diffraction analysis. X-Ray diffraction discloses that complexes adopt tetranuclear tin(
) ladder-like structures containing two (
) or four (
) deprotonated ligands. The essential difference between their molecular structures is that in
there are four carboxylate ligands, while in
and
there are two. The crystal structure of
reveals them to be a tetranuclear structure containing a three-rung-staircase Sn
core. The Sn
cluster consists of a ladder of four Sn
units. For
, the structure is a tetranuclear centrosymmetric dimer of an oxoditin unit having a central four-member ring. In this complex, the central Sn
core is fused with two four-member and two six-member rings. In the structures, there are two types of tin ions arranged in distorted trigonal bipyramid geometry or octahedron geometry. A series of O–H⋯N, C–H⋯O, and C–H⋯π intermolecular hydrogen bonds in these complexes play an important function in the supramolecular, or two-dimensional network structures are formed by these interactions.
Abstract Natural spices play an essential role in human nutrition and well-being. However, their processing on different scales can expose them to potential sources of contamination. This study aimed ...to describe the bacterial community genomic footprint in spices sold in Senegal. Spice samples were collected in August 2022 in Saint-Louis, Senegal. The genomic region coding bacterial 16S rRNA was then amplified and sequenced using Oxford Nanopore Technology (ONT). Sequencing was carried out on two batches of samples, one containing part of the “Local Spices or Herbs” (n = 10), and the other, a mixture of 7 spices, Curcuma, Thyme and the other part of the “Local Spices or Herbs” (n = 39). Results showed high bacterial diversity and the predominance of Escherichia coli and Salmonella enterica in samples, with total reads of 65,744 and 165,325 for the two batches, respectively. The sample category “Homemade mixture of food condiments “, which includes all “Local Spices or Herbs” samples, showed remarkable bacterial diversity. These were followed by Curcuma, a blend of 7 spices and thyme. Also, the different categories of spices studied show similarities in their bacterial composition. These results highlight the microbial community’s highly diverse genomic profile, including pathogenic bacteria, in spice samples.
Four new adducts catena-O,O′-glutaratotriphenylstannate, (Me4N)2O2C(CH2)3CO2×4SnPh3Cl (1), (Me4N)2O2C(CH2)3CO2×3SnPh3Cl (2), (SnPh3)2O2C(CH2)3CO2×SnPh3Cl (2′) and (Cy2NH2)2O2C(CH2)3CO2×SnPh3Cl (3), ...have been isolated from the reactions carried out in solution. The compounds have been characterized by FT-IR and Mössbauer spectroscopies except for 2’ whose structure is proposed on the basis of FT-IR data. Overall, the spectra studies sheew existence of several caracteristic bands such as υ (C=O), υ (CO2–), υ (Sn–O), υ (Sn–Cl), vibrations of glutarate ions, and the intense doublet showing the presence of phenyl groups. In the solid state, the suggested structures are discrete or of infinite chain. In this work, the geometry at Sn centers, trigonal bipyramidal or tetrahedral, is ascertained by the Mössbauer parameters. The glutarate ions exhibit a monodentate, tridentate or tetradentate coordination behavior towards the Sn atoms.
Three organotin (IV) derivatives PhPO3HSnBu2Cl, SnBu2Ph2PO2Cl×3/2H2O, Sn(PhPO3)Cl2×2H2O obtained on allowing PhPO3H2 or propylammonium PhPO3H to react with SnBu2Cl2, SnCl2×2H2O and two adducts ...(C6H5CH2)2NH23O2C(CH2)2PO3×3SnPh3Cl, CyNH3(HO2POCH2-N(CH2CO2H)22×3SnCl4.2H2O×NH4Cl obtained on allowing (C6H5CH2)NH2)3O2C(CH2)2PO3 or CyNH3(HO2POCH2-N(CH2 CO2H)22 and SnPh3Cl or SnCl2×2H2O to react in ethanolic media have been characterized by elemental analyses, infrared and Mossbauer techniques. The suggested structures, while considering the anionic counterpart, are discrete, dimeric, double and triple metallic components or of infinite chain types, the anion behaving as a monochelating, a bichelating or a bidentate ligand. In OH containing structures, when extra hydrogen bonds are considered, supramolecular architectures may be obtained.
Four new carboxyalkylphosphonate SnR2 residue (R = Me, Ph, Bu) containing adducts and derivatives i.e. {(Cy2NH2)3(O2CCH2PO3)(SnBu2Cl2)} (1), {(SnMe2Cl)(O2CCH2PO3H2)4Cy2NH2Cl} (2), ...{(Me4N)(SnPh2Cl)O2C(CH2)2 PO3H(SnPh2)O2C(CH2)2PO3H} (3) and {(Cy2NH2)2(O2CCH2PO3H)(SnPh2Cl2)2} (4), have been synthesized from one-pot reactions carried out in solution. All compounds have been investigated by spectral techniques (infrared and Mossbauer). The spectral studies have evidenced presence of several characteristic bands, especially υ (C=O), υ (OH), υ (CO2- ), υ (PO32- ) vibrations coming from carboxyalkylphosphonate ions, with wide absorption due to the NH2 groups coming from the dicyclohexylammonium counter ion (for 1, 2 and 4) and the intense doublet which show the presence of phenyl groups (for 3 and 4). In the solid state, the proposed structures are discrete or of infinite chain however hydrogen bonding patterns may occur. Event in this investigation is the presence, for compound 3, of two types of arrangement at Sn centers viz. an octahedron and a trigonal bipyramidal whose presence are ascertained by the Mossbauer parameters. The neutral or acidic carboxyalkylphosphonate ions exhibit a diversity of coordination behavior towards the Sn atoms: monochelating (carboxylate and phosphonate O-donor), monochelating through the carboxylate and unidentate coordinating O-donor through the phosphonic acid or acidic phosphonate, bichelating with chelations from carboxylate and acidic phosphonate, and unidentate from both the carboxylate and phosphonic acid.
The synthesis and spectroscopic studies (infrared and Mössbauer) of new hydrogenoxalato derivatives and adducts containing SnRn (R=Me, Ph; n=2, 3) residues are reported. Based on their spectroscopic ...data dimeric and polymeric structures containing hexacoordinated or pentacoordinated Sn are suggested, the hydrogenoxolate anion behaving as a monocoordinating or a monochelating ligand. In two studied adducts, supramolecular architectures may be obtained when extra hydrogen bonds involving the free NH groups are considered.
The asymmetric unit of the title organic–inorganic hybrid complex systematic name: ethane-1,2-diaminium hexachloridostannate(IV)–4-methoxybenzaldehyde (1/2), (C
2
H
10
N
2
)SnCl
6
·2C
8
H
8
O
2
, ...contains one half of an ethylenediammonium cation, one half of an SnCl
6
2−
anion and one
p
-anisaldehyde molecule. Both the organic cation and the quasi-regular octahedral inorganic anion are located about inversion centres. The organic cations and SnCl
6
2−
anions lie in layers parallel to the
ac
plane with
p
-anisaldehyde molecules occupying the space between the layers. A network of classical N—H...Cl and N—H...O hydrogen bonds exists between the ethylenediammonium cations and the SnCl
6
2−
anions and
p
-anisaldehyde molecules. These interactions, together with non-classical C—H...O interactions between the ethylenediammonium cations and the
p
-anisaldehyde molecules, serve to hold the structure together. The crystal studied was refined as a two-component twin.
The title polymer HCO2Sn(C6H5)3n was isolated by serendipitous from reaction in ethanol 96 % between bis-(monocyclohexyl ammonium) 2-carboxyethyl hydrogen phosphonate, {(CyNH3)2CO2CH2CH2PO2(OH)} and ...triphenyltin chloride, SnPh3Cl. The polymer crystallizes in the monoclinic space group P21/n with Z = 4, a = 14.7091 (18) Å, b = 15.4133 (19) Å, c = 14.7639 (18) Å, β = 94.242 (2)° and V = 3338.0 (7) Å3. The structure consists of an infinite chain propagating along the crystallographic a-axis direction with bidentate formate anions. The O2SnC3 core is organized into a trans-trigonal bipyramidal like-arrangement.
Eight new adducts and derivatives have been synthesized and studied by infrared. Discrete, layered or infinite chain structures are suggested with an oxalate behaving as a monodentate, bidentate, ...monochelating or bichelating ligand, the environment around the tin centres being tetrahedral, cis trigonal bipyramidal or octahedral. In all the studied compounds, supramolecular architectures may be obtained when intermolecular hydrogen bonds are considered.
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