# Species Formula 4540 Strontium dibromideBr2Sr 4541 Sr(II)N5Br2 (TANWAG) (Geo)C25H25N5Br2Sr 4542 Sr(II)N5Br2 (TANWAG)C25H25N5Br2Sr 4543 cis-Sr(II)(H2O)4.Br2H8O4Br2Sr 4544 cis-Sr(II)(H2O)4.Br2 (Geo)H8O4Br2Sr 4545 Yttrium, cationY 4546 Yttrium, atomY 4547 Trimethyl yttrium(III) (Geo)C3H9Y 4548 Bicyclopentadienyl yttrium(II) (Geo)C10H10Y 4549 Tricyclopentadienyl yttrium(III)C15H15Y 4550 Y(Cp)2CN (CIGZEX) (Geo) C19H22NY 4551 Y(Cp)2CN (CIGZEX)C19H22NY 4552 Y(III)N3 (FAMVEV) (Geo)C27H54N3Y 4553 Y(III)N3 (FAMVEV)C27H54N3Y 4554 Y(II)(NH3)6H18N6Y 4555 Y(II)(NH3)6 (Geo)H18N6Y 4556 Y(III)N8(3+) (ROGRUA) (Geo)C8H32N8Y 4557 Y(III)N8(3+) (ROGRUA)C8H32N8Y 4558 Y(III)N9(3+) (XAWXIC) (Geo)C45H33N9Y 4559 Y(III)N9(3+) (XAWXIC)C45H33N9Y 4560 Yttrium(II) oxide (Geo)OY