11 research outputs found
4-(3-Azaniumylpropyl)morpholin-4-ium chloride hydrogen oxalate: An unusual example of a dication with different counter-anions
© 2014 International Union of Crystallography. The mixed organic-inorganic title salt, C7H18N2O2+·C2HO4-·Cl-, forms an assembly of ionic components which are stabilized through a series of hydrogen bonds and charge-assisted intermolecular interactions. The title assembly crystallizes in the monoclinic C2/c space group with Z = 8. The asymmetric unit consists of a 4-(3-azaniumylpropyl)morpholin-4-ium dication, a hydrogen oxalate counter-anion and an inorganic chloride counter-anion. The organic cations and anions are connected through a network of N - H⋯O, O - H⋯O and C - H⋯O hydrogen bonds, forming several intermolecular rings that can be described by the graph-set notations R33(13), R21(5), R12(5), R21(6), R23(6), R22(8) and R33(9). The 4-(3-azaniumylpropyl)morpholin-4-ium dications are interconnected through N - H⋯O hydrogen bonds, forming C(9) chains that run diagonally along the ab face. Furthermore, the hydrogen oxalate anions are interconnected via O - H⋯O hydrogen bonds, forming head-to-tail C(5) chains along the crystallographic b axis. The two types of chains are linked through additional N - H⋯O and O - H⋯O hydrogen bonds, and the hydrogen oxalate chains are sandwiched by the 4-(3-azaniumylpropyl)morpholin-4-ium chains, forming organic layers that are separated by the chloride anions. Finally, the layered three-dimensional structure is stabilized via intermolecular N - H⋯Cl and C - H⋯Cl interactions
Platinum Complexes with a Phosphino-Oxime/Oximate Ligand
The platinum(II) complex [PtCl2(COD)] (2; COD = 1,5-
cyclooctadiene) reacted with 1 and 2 equiv. of 2-(diphenylphosphanyl)
benzaldehyde oxime (1) to generate [PtCl2{¿2-(P,N)-2-
Ph2PC6H4CH=NOH}] (3) and [Pt{¿2-(P,N)-2-Ph2PC6H4CH=NOH}2]-
[Cl]2 (4), respectively. Deprotonation of the oxime hydroxyl
group of 3 with Na2CO3 led to the selective formation of the
dinuclear species (¿-O)-[PtCl{¿2-(P,N)-2-Ph2PC6H4CH=NO}]2 (5),
while the related methylated derivative (¿-O)-[PtMe{¿2-(P,N)-2-
Ph2PC6H4CH=NO}]2 (7) could be obtained from the direct reaction
of [PtMe2(COD)] (6) with the phosphino-oxime ligand 1. In
the case of 4, its treatment with Na2CO3 yielded complex [Pt({¿2-(P,N)-2-Ph2PC6H4CH=NO}2H)][Cl] (8), as a result of the deprotonation
of only one of the OH groups of 4. On the other
hand, contrary to what was observed with 6, no deprotonation
of the oxime occurred in the reaction of [PtMe3I]4 (9) with 1,
from which the mononuclear PtIV derivative fac-[PtIMe3{¿2-(P,N)-
2-Ph2PC6H4CH=NOH}] (10) was isolated. The solid-state structures
of compounds 3, 4, 7 and 10 were determined by X-ray
crystallography. In addition, the potential of all the synthesized
complexes as catalysts for the dehydrogenative coupling of
hydrosilanes with alcohols is also briefly discussed.Peer Reviewe