Two New Tetramethylammonium Zinc Phosphates: [N(CH3)4][Zn(HPO4)(H2PO4)], an Open Framework Phase built up from a Low-Density 12-Ring Topology, and [N(CH3)4][Zn(H2PO4)3], a Molecular Cluster
作者： William T.A. Harrison , Lakshitha Hannooman
关键词: Chemistry 、 Tetrahedron 、 Phase (matter) 、 Zinc 、 Crystallography 、 Single crystal 、 Monoclinic crystal system 、 Triclinic crystal system 、 Tetramethylammonium 、 Crystal structure 、 Stereochemistry
摘要: Abstract The solution-phase syntheses and X-ray single crystal structures of N(CH3)4·Zn(HPO4)(H2PO4) N(CH3)4·Zn(H2PO4)3, two new tetramethylammonium (TMA) zinc phosphates, are described. is a three-dimensional framework phase built up from ZnO4, HPO4, H2PO4tetrahedra sharing vertices. polyhedral connectivity results in novel, low-density topology, based on tetrahedral 12-rings. TMA cations provide extra-framework charge balancing, occupy the 12-ring channel network. N(CH3)4·Zn(H2PO4)3is “zero-dimensional” (molecular) same units, formed into discrete anionic clusters. Crystal data: N(CH3)4·Zn(HPO4)(H2PO4),Mr=332.49, monoclinic, space groupPc(No. 7),a=8.443 (2) A,b=13.779 (4) A,c=10.170 A,β=91.91 (2)°,V=1182.9 (5) A3,Z=4,R(F)=4.69%,Rw(F)=5.46% [3284 observed reflections withI>3σ(I)]. N(CH3)4·Zn(HPO4)(H2PO4)3,Mr=430.49, triclinic, groupP 1 (No. 2),a=8.950 A,b=10.068 A,c=10.263 A,α=61.649 (9)°,β=76.04 (2)°,γ=76.72 (1)°,V=782.5 A3,Z=2,R(F)=4.22%Rw(F)=4.77% [3038
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