Influence of Hydrogen Bonding on the Assembly of Six-Membered Vanadium\nBorophosphate Cluster Anions: Synthesis and Structures of\n(NH<sub>4</sub>)<sub>2</sub>(C<sub>2</sub>H<sub>10</sub>N<sub>2</sub>)<sub>6</sub>[Sr(H<sub>2</sub>O)<sub>5</sub>]<sub>2</sub>[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·10H<sub>2</sub>O,\n(NH<sub>4</sub>)<sub>2</sub>(C<sub>3</sub>H<sub>12</sub>N<sub>2</sub>)<sub>6</sub>[Sr(H<sub>2</sub>O)<sub>4</sub>]<sub>2</sub>[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·17H<sub>2</sub>O, and\n(NH<sub>4</sub>)<sub>3</sub>(C<sub>4</sub>H<sub>14</sub>N<sub>2</sub>)<sub>4.5</sub>[Sr(H<sub>2</sub>O)<sub>5</sub>]<sub>2</sub>[Sr(H<sub>2</sub>O)<sub>4</sub>][V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·10H<sub>2</sub>O
Junghwan Do (2102317)Ranko P. Bontchev (2425492)Allan J. Jacobson (1644922)
Abstract
Three new strontium vanadium borophosphate compounds, (NH<sub>4</sub>)<sub>2</sub>(C<sub>2</sub>H<sub>10</sub>N<sub>2</sub>)<sub>6</sub>[Sr(H<sub>2</sub>O)<sub>5</sub>]<sub>2</sub>[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·10H<sub>2</sub>O (Sr-VBPO1) (<b>1</b>), (NH<sub>4</sub>)<sub>2</sub>(C<sub>3</sub>H<sub>12</sub>N<sub>2</sub>)<sub>6</sub>[Sr(H<sub>2</sub>O)<sub>4</sub>]<sub>2</sub>[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·17H<sub>2</sub>O (Sr-VBPO2) (<b>2</b>), and (NH<sub>4</sub>)<sub>3</sub>(C<sub>4</sub>H<sub>14</sub>N<sub>2</sub>)<sub>4.5</sub>[Sr(H<sub>2</sub>O)<sub>5</sub>]<sub>2</sub>[Sr(H<sub>2</sub>O)<sub>4</sub>][V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·10H<sub>2</sub>O (Sr-VBPO3) (<b>3</b>) have been synthesized by interdiffusion methods in the\npresence of diprotonated ethylenediamine, 1,3-diaminopropane, and 1,4-diaminobutane. Compound <b>1</b> has a chain\nstructure, whereas <b>2</b> and <b>3</b> have layered structures with different arrangements of [(NH<sub>4</sub>)⊃[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>] cluster\nanions within the layers. Crystal data: (NH<sub>4</sub>)<sub>2</sub>(C<sub>2</sub>H<sub>10</sub>N<sub>2</sub>)<sub>6</sub>[Sr(H<sub>2</sub>O)<sub>5</sub>]<sub>2</sub>[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·10H<sub>2</sub>O, monoclinic, space group\n<i>C</i>2/<i>c</i> (no. 15), <i>a</i> = 21.552(1) Å, <i>b</i> = 27.694(2) Å, <i>c</i> = 20.552(1) Å, <i>β</i> = 113.650(1)°, <i>Z</i> = 4; (NH<sub>4</sub>)<sub>2</sub>(C<sub>3</sub>H<sub>12</sub>N<sub>2</sub>)<sub>6</sub>[Sr(H<sub>2</sub>O)<sub>4</sub>]<sub>2</sub>[V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·17H<sub>2</sub>O, monoclinic, space group <i>I</i>2/<i>m</i> (no. 12), <i>a</i> = 15.7618(9) Å, <i>b</i> = 16.4821(9) Å, <i>c</i>\n= 21.112(1) Å, β = 107.473(1)°, <i>Z</i> = 2; (NH<sub>4</sub>)<sub>3</sub>(C<sub>4</sub>H<sub>14</sub>N<sub>2</sub>)<sub>4.5</sub>[Sr(H<sub>2</sub>O)<sub>5</sub>]<sub>2</sub>[Sr(H<sub>2</sub>O)<sub>4</sub>] [V<sub>2</sub>P<sub>2</sub>BO<sub>12</sub>]<sub>6</sub>·10H<sub>2</sub>O, monoclinic,\nspace group <i>C</i>2/<i>c</i> (no. 15), <i>a</i> = 39.364(2) Å, <i>b</i> = 14.0924(7) Å, <i>c</i> = 25.342(1) Å, <i>β</i> = 121.259(1)°, <i>Z</i> = 4. The\ndifferences in the three structures arise from the different steric requirements of the amines that lead to different\namine−cluster hydrogen bonds.
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