Ca[PO₂(NH)₃(CO)₂]₂ – The First Biuretooxophosphate with a Divalent Cation

Abstract

Calcium biuretooxophosphate Ca[PO 2 (NH) 3 (CO) 2 ] 2 was synthesized by ion exchange reaction in aqueous solution. The crystal structure of the salt was elucidated by single-crystal X-ray diffraction. Anionic 1-phospha-2,4,6-s-triazine rings exhibiting a half-chair conformation act as monodentate ligands for the calcium ions. A 3D network is formed by the resulting CaO 6 octahedrons together with the

Unravelling the Urea-Route to Boron Nitride: Synthesis and Characterization of the Crucial Reaction Intermediate Ammonium Bis(biureto)borate

“…13) with two formula units per unit cell (Figure ). The structure features bicyclic [B­(biu) 2 ] − spiro-anions, which are isoelectronic to the bis­(biguanidato)­boron­(III) cation [B­(big) 2 ] + (NH–(C–NH 2 )N–(C–NH 2 )NH, , big = biguanidium) in [B­(big) 2 ]­Cl.0.5 H 2 O and show some similarities to long known biuretooxophosphate and biuretothiophosphate anions. − The spiro-atom is a boron atom situated on a special position (2 f ), which is tetrahedrally coordinated by four amide groups of two chelating biuretate moieties. All other atoms of [B­(biu) 2 ] − are located on general positions.…”

A UV solar-blind nonlinear optical crystal with confined π-conjugated groups

“…First, Na[PO 2 (NH) 3 (CO) 2 ] powder was prepared by a simple low-temperature solution method according to previous reports. 21,22 1.04 g of Rb 2 CO 3 (4.5 mmol, Adamas, 99%) and 5.29 g of ion exchange resin were thoroughly mixed in 20 mL of deionized water at room temperature. Then the mixed solution was loaded onto the ion exchange column.…”

“…Guided by this idea, through the screening of known compounds, we selected and synthesized Rb[PO 2 (NH) 3 (CO) 2 ]•0.5H 2 O (RPNCO) with a non-centrosymmetric (NCS) structure. [21][22][23] It is shown that RPNCO exhibits a large SHG response of about 4.2 × KH 2 PO 4 (KDP), a short absorption edge of about 220 nm, and a suitable birefringence of about 0.055@550 nm.…”