Catalog
C21H19NO6W
C21H19NO6W
Tetrahedron (1990) 46, 4 1235-1252
a=8.886(1)Å b=10.706(1)Å c=12.807(1)Å
α=109.50(1)° β=108.06(1)° γ=98.94(1)°
C42H84Li4O8S2Si4
C42H84Li4O8S2Si4
Angewandte Chemie, International Edition in English (1987) 26, 12 1287-1288
a=11.195(3)Å b=21.374(5)Å c=12.619(3)Å
α=90° β=112.66(3)° γ=90°
C21H19CrO5P
C21H19CrO5P
Angewandte Chemie, International Edition in English (1988) 27, 5 713-714
a=10.334(3)Å b=11.834(1)Å c=16.445(2)Å
α=90° β=102.33° γ=90°
C10H16LiNO
C10H16LiNO
Journal of the American Chemical Society (1988) 110, 20 6925-6926
a=11.493(3)Å b=9.567(2)Å c=19.636(3)Å
α=90° β=93.18(2)° γ=90°
C24H24N2O
C24H24N2O
Tetrahedron Letters (1988) 29, 27 3295-3298
a=8.225(2)Å b=10.598(2)Å c=12.754(2)Å
α=96.30(1)° β=105.52(1)° γ=106.17(1)°
C17H13CrNO6
C17H13CrNO6
Journal of Organometallic Chemistry (1988) 355, 1-3 177-191
a=9.786(1)Å b=10.649(1)Å c=16.435(2)Å
α=90° β=98.60(1)° γ=90°
C13H10CrO5S
C13H10CrO5S
Journal of Organometallic Chemistry (1988) 355, 1-3 177-191
a=7.477(1)Å b=9.591(1)Å c=11.090(1)Å
α=73.08(2)° β=72.89(2)° γ=77.19(2)°
C17H25LiN4
C17H25LiN4
Angewandte Chemie, International Edition in English (1989) 28, 1 72-73
a=14.724(3)Å b=8.561(2)Å c=13.267(3)Å
α=90° β=104.11(2)° γ=90°
C8H6N4
C8H6N4
Angewandte Chemie, International Edition in English (1989) 28, 1 73-75
a=12.941(2)Å b=9.450(1)Å c=6.459(1)Å
α=90° β=90° γ=90°
C19H22CrO5
C19H22CrO5
Journal of the Chemical Society, Chemical Communications (1989) 11 692-693
a=22.736(5)Å b=6.809(1)Å c=25.373(10)Å
α=90° β=107.86(2)° γ=90°
C26H52Li2N6
C26H52Li2N6
Angewandte Chemie, International Edition in English (1989) 28, 10 1392-1394
a=9.968(2)Å b=11.966(3)Å c=14.171(2)Å
α=77.24(2)° β=73.47(1)° γ=87.16(2)°
C17H17CrNO6
C17H17CrNO6
Angewandte Chemie, International Edition in English (1989) 28, 10 1384-1386
a=23.355(5)Å b=11.187Å c=15.629Å
α=90° β=111.66(1)° γ=90°
C90H182Li24N12O6Si12
C90H182Li24N12O6Si12
Chemische Berichte (1989) 122, 7 1307-1311
a=15.574(2)Å b=15.678(1)Å c=16.257(1)Å
α=74.01(1)° β=84.38(1)° γ=61.32(1)°
C16H13NO6W
C16H13NO6W
Tetrahedron (1990) 46, 4 1235-1252
a=6.110(2)Å b=9.353(3)Å c=14.739(4)Å
α=82.96(3)° β=83.11(2)° γ=85.04(2)°
C30H38N2O5
C30H38N2O5
Tetrahedron: Asymmetry (1990) 1, 6 371-374
a=9.617(1)Å b=11.345(1)Å c=15.090(2)Å
α=97.07(1)° β=108.05(1)° γ=107.29(1)°
C16H24O2
C16H24O2
Angewandte Chemie, International Edition in English (1980) 19, 2 134-135
a=11.907(3)Å b=8.094(2)Å c=14.868(5)Å
α=90° β=90.03(5)° γ=90°
C9H20ClNO
C9H20ClNO
Acta Crystallographica, Section B: Structural Crystallography and Crystal Chemistry (1980) 36, 12 3206-3208
a=7.440(2)Å b=11.609(2)Å c=12.295(3)Å
α=90° β=90° γ=90°
C22H28O2Se
C22H28O2Se
Acta Crystallographica, Section B: Structural Crystallography and Crystal Chemistry (1980) 36, 12 3159-3162
a=10.298(3)Å b=9.915(2)Å c=10.835(2)Å
α=90° β=114.62(4)° γ=90°
C26H37LiN2O3
C26H37LiN2O3
Angewandte Chemie, International Edition in English (1988) 27, 11 1522-1524
a=7.894(1)Å b=16.227(2)Å c=9.707(2)Å
α=90° β=101.01° γ=90°
C56H64Li2N2O2
C56H64Li2N2O2
Chemische Berichte (1990) 123, 9 1853-1858
a=15.141(2)Å b=15.338(2)Å c=20.827(2)Å
α=90° β=90° γ=90°
C26H29NO
C26H29NO
Chemische Berichte (1990) 123, 3 555-563
a=9.425(2)Å b=9.490(2)Å c=12.386(1)Å
α=94.741(1)° β=97.68(1)° γ=102.49(1)°
C20H28N2O4
C20H28N2O4
Chemische Berichte (1990) 123, 3 555-563
a=9.939(2)Å b=8.520(2)Å c=23.674(1)Å
α=90° β=90° γ=90°
C32H72Li8O4
C32H72Li8O4
Angewandte Chemie, International Edition in English (1990) 29, 3 308-309
a=11.024(6)Å b=23.659(9)Å c=16.377(18)Å
α=90° β=101.83(3)° γ=90°
C15H26O3Si
C15H26O3Si
Chemische Berichte (1990) 123, 4 917-925
a=7.963(1)Å b=10.014(1)Å c=12.011(2)Å
α=90° β=109.220(6)° γ=90°
C16H15CrNO4
C16H15CrNO4
Angewandte Chemie, International Edition in English (1990) 29, 2 176-177
a=8.854(2)Å b=13.399(1)Å c=25.919(6)Å
α=90° β=95.38(1)° γ=90°
C54H64Li2O10S2
C54H64Li2O10S2
Angewandte Chemie, International Edition in English (1988) 27, 6 846-847
a=10.147(3)Å b=10.693(2)Å c=11.919(3)Å
α=86.94(2)° β=88.69(2)° γ=85.89(2)°
C12H16Cl4O2Sn
C12H16Cl4O2Sn
Tetrahedron Letters (1988) 29, 46 5881-5884
a=9.695(4)Å b=12.819(3)Å c=13.696(6)Å
α=90° β=90° γ=90°
C9H10Cl4O2Sn
C9H10Cl4O2Sn
Tetrahedron Letters (1988) 29, 46 5881-5884
a=14.876(2)Å b=13.720(5)Å c=14.101(6)Å
α=90° β=99.43(3)° γ=90°
C29H29AuO2PS
C29H29AuO2PS
Journal of Organometallic Chemistry (1989) 364, 1-2 275-279
a=11.750(4)Å b=14.001(5)Å c=16.751(7)Å
α=90° β=107.21(3)° γ=90°
C19H21CrO6P
C19H21CrO6P
Journal of the Chemical Society, Chemical Communications (1989) 12 788-790
a=15.462(5)Å b=6.780(1)Å c=19.762(5)Å
α=90° β=101.84(2)° γ=90°
C15H12O4SW
C15H12O4SW
Chemische Berichte (1989) 122, 6 1043-1047
a=10.093(5)Å b=11.836(5)Å c=13.157(5)Å
α=90° β=106.72° γ=90°
C53H71CoN6O14
C53H71CoN6O14
Acta Crystallographica, Section C: Crystal Structure Communications (1989) 45, 10 1589-1593
a=15.595(2)Å b=18.672(4)Å c=19.023(5)Å
α=90° β=90° γ=90°
C23H25CrNO7
C23H25CrNO7
Journal of Organometallic Chemistry (1989) 375, 2 C47-C50
a=11.093(2)Å b=11.474(1)Å c=19.574Å
α=90° β=93.63(1)° γ=90°
C17H31LiN2O
C17H31LiN2O
Chemische Berichte (1989) 122, 12 2303-2309
a=8.682(2)Å b=15.387(1)Å c=13.934(3)Å
α=90° β=103.30(1)° γ=90°
C25H30O4Si
C25H30O4Si
Tetrahedron Letters (1993) 34, 14 2299-2302
a=8.109(1)Å b=11.7878(1)Å c=13.696(1)Å
α=109.38(1)° β=104.620(1)° γ=96.65(1)°
C26H44Li2N2O2
C26H44Li2N2O2
Chemische Berichte (1993) 126, 8 1887-1894
a=9.320(1)Å b=12.832(1)Å c=11.842(1)Å
α=90° β=106.47(1)° γ=90°
C28H44LiN3O
C28H44LiN3O
Chemische Berichte (1993) 126, 8 1887-1894
a=9.466(3)Å b=12.907(3)Å c=21.268(3)Å
α=90° β=90° γ=90°
C34H46I2Li2N2O4
C34H46I2Li2N2O4
Chemische Berichte (1993) 126, 8 1887-1894
a=9.478(8)Å b=10.091(6)Å c=20.268(16)Å
α=81.44(6)° β=76.61(6)° γ=69.23(5)°
C17H17CrNO6
C17H17CrNO6
Organometallics (1992) 11, 1 298-310
a=23.355(5)Å b=11.187Å c=15.629Å
α=90° β=111.66(1)° γ=90°
C16H31LiN2Si
C16H31LiN2Si
Chemische Berichte (1991) 124, 3 543-549
a=12.955(2)Å b=9.721(2)Å c=15.582(1)Å
α=90° β=102.54(1)° γ=90°
C25H35LiO3S
C25H35LiO3S
Chemische Berichte (1991) 124, 3 543-549
a=9.106(2)Å b=9.394(2)Å c=28.743(6)Å
α=90° β=93.13(2)° γ=90°
C12H22O2
C12H22O2
Chemische Berichte (1991) 124, 3 551-561
a=6.326(1)Å b=11.667(1)Å c=15.709(2)Å
α=90° β=94.90(1)° γ=90°
C12H21BrO2
C12H21BrO2
Chemische Berichte (1991) 124, 3 551-561
a=6.351(2)Å b=11.877(6)Å c=16.860(6)Å
α=90° β=90.92(3)° γ=90°
C17H12CrN2O4
C17H12CrN2O4
Chemische Berichte (1992) 125, 9 2137-2142
a=6.3290(1)Å b=7.8050(1)Å c=16.8120(1)Å
α=77.290(1)° β=83.140(1)° γ=78.750(1)°
C14H13MoNO5
C14H13MoNO5
Chemische Berichte (1992) 125, 9 2143-2148
a=8.370(2)Å b=15.438(3)Å c=12.661(3)Å
α=90° β=106.43(3)° γ=90°
C25H26CrN2O4
C25H26CrN2O4
Journal of Organometallic Chemistry (1992) 439, 3 263-277
a=10.796(1)Å b=15.242(1)Å c=14.732(2)Å
α=90° β=99.32(1)° γ=90°
C25H35Li3N6O8
C25H35Li3N6O8
Chemische Berichte (1992) 125, 1 87-92
a=7.815(1)Å b=14.467(3)Å c=27.772(5)Å
α=90° β=92.175(1)° γ=90°
C13H21N2NaO5
C13H21N2NaO5
Chemische Berichte (1992) 125, 1 87-92
a=7.345(1)Å b=14.108(1)Å c=7.785(1)Å
α=90° β=95.065(4)° γ=90°
C26H46N5NaO
C26H46N5NaO
Chemische Berichte (1992) 125, 1 87-92
a=13.312(1)Å b=13.874(1)Å c=15.717(1)Å
α=90° β=90° γ=90°
C39H52B1N1O9
C39H52B1N1O9
Angewandte Chemie, International Edition in English (1991) 30, 11 1474-1476
a=10.938(1)Å b=13.923(1)Å c=14.477(2)Å
α=101.16(1)° β=109.52(1)° γ=104.29(1)°
C31H42B1N1O8
C31H42B1N1O8
Angewandte Chemie, International Edition in English (1991) 30, 11 1474-1476
a=15.359(3)Å b=9.994(2)Å c=20.678(4)Å
α=90° β=105.55(3)° γ=90°
C28H36Br2Li2O4
C28H36Br2Li2O4
Angewandte Chemie, International Edition in English (1991) 30, 11 1455-1457
a=8.200(4)Å b=8.916(5)Å c=11.315(4)Å
α=72.87(3)° β=69.01(3)° γ=74.97(4)°
C21H31F1Li1N3O2S1
C21H31F1Li1N3O2S1
Angewandte Chemie, International Edition in English (1991) 30, 11 1455-1457
a=8.894(3)Å b=19.972(2)Å c=13.046(4)Å
α=90° β=101.34(1)° γ=90°
C8H6F6O6S2
C8H6F6O6S2
Chemische Berichte (1992) 125, 1 271-278
a=9.612(2)Å b=14.335(2)Å c=9.814(2)Å
α=90° β=97.53(1)° γ=90°
C20H12O5W
C20H12O5W
Angewandte Chemie, International Edition in English (1992) 31, 9 1236-1238
a=9.097(1)Å b=9.616(1)Å c=10.958(1)Å
α=95.31(1)° β=93.44(1)° γ=108.19(1)°
C40H84Li4N8
C40H84Li4N8
Angewandte Chemie, International Edition in English (1992) 31, 9 1205-1207
a=22.077(1)Å b=12.230(1)Å c=16.528(1)Å
α=90° β=90° γ=90°
C28H44LiO4Si
C28H44LiO4Si
Chemische Berichte (1992) 125, 10 2265-2273
a=15.300(3)Å b=10.130(2)Å c=19.369(4)Å
α=90° β=109.60(3)° γ=90°
C36H40Cl3NNaO9OsP
C36H40Cl3NNaO9OsP
Zeitschrift fuer Anorganische und Allgemeine Chemie (1993) 619, 8 1409-1413
a=19.314(3)Å b=11.787(3)Å c=17.641(4)Å
α=90° β=99.39(2)° γ=90°
C15H14MoN2O4
C15H14MoN2O4
Journal of Organometallic Chemistry (1993) 459, 1-2 169-176
a=8.456(1)Å b=17.175(1)Å c=12.340(2)Å
α=90° β=107.67(1)° γ=90°
C22H26N2O3
C22H26N2O3
Tetrahedron Letters (1992) 33, 24 3453-3456
a=9.095(1)Å b=10.164(1)Å c=22.410(2)Å
α=90° β=90° γ=90°
C20H38N2O5
C20H38N2O5
Angewandte Chemie, International Edition in English (1992) 31, 12 1626-1629
a=11.137(2)Å b=11.260(2)Å c=18.646(4)Å
α=90° β=90° γ=90°
C28H40Cl3LiN2O2
C28H40Cl3LiN2O2
Angewandte Chemie, International Edition in English (1993) 32, 7 1032-1033
a=12.734(6)Å b=15.160(4)Å c=16.540(6)Å
α=90° β=106.67(2)° γ=90°
C32H24O2
C32H24O2
Angewandte Chemie, International Edition in English (1992) 31, 9 1236-1238
a=10.580(1)Å b=12.645(1)Å c=18.342(2)Å
α=80.52(1)° β=81.69(1)° γ=73.59(1)°
C34H56Li2N4O6P2
C34H56Li2N4O6P2
Chemische Berichte (1991) 124, 4 861-866
a=12.341(3)Å b=13.003(2)Å c=11.733(3)Å
α=90° β=92.40(1)° γ=90°
C28H51LiN3O2Si
C28H51LiN3O2Si
Angewandte Chemie, International Edition in English (1991) 30, 3 321-323
a=11.886(1)Å b=13.827(2)Å c=18.591(3)Å
α=90° β=90° γ=90°
C15H37LiN2Si2
C15H37LiN2Si2
Journal of the American Chemical Society (1992) 114, 5 1562-1565
a=19.69(3)Å b=11.788(2)Å c=19.56(2)Å
α=90° β=101.28(5)° γ=90°
C37H52LiN3O2
C37H52LiN3O2
Angewandte Chemie, International Edition in English (1992) 31, 1 79-80
a=9.216(10)Å b=17.667(10)Å c=10.98(2)Å
α=90° β=107.65(7)° γ=90°
C24H31BFKO8
C24H31BFKO8
Angewandte Chemie, International Edition in English (1991) 30, 11 1472-1474
a=10.228(2)Å b=20.757(4)Å c=12.38(2)Å
α=90° β=106.05(3)° γ=90°
C36H46N2O2Zn2
C36H46N2O2Zn2
Chemische Berichte (1992) 125, 5 1191-1203
a=25.436(5)Å b=10.255(2)Å c=14.294(3)Å
α=90° β=113.78(3)° γ=90°
C26H24Cl2NO2OsP
C26H24Cl2NO2OsP
Zeitschrift fuer Anorganische und Allgemeine Chemie (1993) 619, 5 853-858
a=17.503(2)Å b=8.168(1)Å c=18.165(2)Å
α=90° β=95.16(1)° γ=90°
C38H48Cl2NO4OsP
C38H48Cl2NO4OsP
Zeitschrift fuer Anorganische und Allgemeine Chemie (1993) 619, 5 853-858
a=8.989(8)Å b=14.051(8)Å c=15.186(11)Å
α=93.66(5)° β=92.89(5)° γ=92.51(4)°
C22H54Li2N4Si4
C22H54Li2N4Si4
Angewandte Chemie, International Edition in English (1993) 32, 8 1171-1173
a=9.229(3)Å b=13.091(2)Å c=14.967(4)Å
α=94.37(2)° β=100.10(2)° γ=100.94(2)°
C14H29N3O4
C14H29N3O4
Journal of the Chemical Society, Chemical Communications (1993) 20 1558-1560
a=14.715(1)Å b=15.430(1)Å c=15.029(1)Å
α=90° β=90° γ=90°
C15H19CrO5P
C15H19CrO5P
Tetrahedron (1993) 49, 25 5577-5597
a=13.098(1)Å b=7.615(1)Å c=17.463(1)Å
α=90° β=110.06(1)° γ=90°
C14H10N2O4
C14H10N2O4
Angewandte Chemie, International Edition in English (1994) 33, 2 181-183
a=3.758(1)Å b=11.196(1)Å c=27.351(2)Å
α=90° β=92.95(1)° γ=90°
C14H10N2O4
C14H10N2O4
Angewandte Chemie, International Edition in English (1994) 33, 2 181-183
a=3.800(1)Å b=11.208(1)Å c=27.447(2)Å
α=90° β=92.22(1)° γ=90°
C14H10N2O4
C14H10N2O4
Angewandte Chemie, International Edition in English (1994) 33, 2 181-183
a=9.619(1)Å b=10.679(2)Å c=12.726(4)Å
α=70.17(3)° β=85.83(2)° γ=70.08(1)°
C14H9DN2O4
C14H9DN2O4
Angewandte Chemie, International Edition in English (1994) 33, 2 181-183
a=3.793(1)Å b=11.175(1)Å c=27.581(4)Å
α=90° β=91.99(1)° γ=90°
C40H64Li2N2O13S2
C40H64Li2N2O13S2
Angewandte Chemie, International Edition in English (1994) 33, 1 115-117
a=11.825(2)Å b=21.268(8)Å c=18.597(4)Å
α=90° β=90° γ=90°
C12H17NO5S
C12H17NO5S
Angewandte Chemie, International Edition in English (1994) 33, 1 115-117
a=9.3700(1)Å b=20.478(1)Å c=8.103(1)Å
α=90° β=110.81(1)° γ=90°
C30H40Br2MgO4
C30H40Br2MgO4
Journal of the Chemical Society, Chemical Communications (1994) 11 1393-1394
a=9.290(2)Å b=19.368(4)Å c=17.159(3)Å
α=90° β=99.63(2)° γ=90°
C25H25FeP5
C25H25FeP5
Journal of the American Chemical Society (1994) 116, 14 6217-6219
a=16.010(3)Å b=9.727(2)Å c=16.193(3)Å
α=90° β=102.11(3)° γ=90°
C26H52Li2N6O4
C26H52Li2N6O4
Chemische Berichte (1994) 127, 10 2059-2064
a=9.058(1)Å b=22.570(2)Å c=8.392(1)Å
α=90° β=101.22(1)° γ=90°
C16H27N3O2
C16H27N3O2
Chemische Berichte (1994) 127, 10 2059-2064
a=11.687(2)Å b=12.462(1)Å c=12.853(2)Å
α=90° β=116.23(1)° γ=90°
C25H32O4Si
C25H32O4Si
Angewandte Chemie, International Edition in English (1994) 33, 11 1180-1182
a=10.555(2)Å b=7.983(2)Å c=14.936(3)Å
α=90° β=109.12(3)° γ=90°
C13H15IO3
C13H15IO3
Tetrahedron Letters (1994) 35, 34 6263-6266
a=8.010(1)Å b=14.740(2)Å c=22.811(2)Å
α=90° β=90° γ=90°
C26H28N2O2
C26H28N2O2
Tetrahedron Letters (1994) 35, 47 8765-8768
a=10.310(2)Å b=18.718(2)Å c=23.545(4)Å
α=90° β=90° γ=90°
C27H30N2
C27H30N2
Tetrahedron Letters (1994) 35, 47 8769-8772
a=33.466(4)Å b=6.977(1)Å c=9.890(2)Å
α=90° β=96.73(1)° γ=90°
C22H33LiO3
C22H33LiO3
Angewandte Chemie, International Edition in English (1995) 34, 19 2158-2160
a=8.951(1)Å b=18.325(1)Å c=12.788(1)Å
α=90° β=93.530(5)° γ=90°
C28H41LiN2
C28H41LiN2
Angewandte Chemie, International Edition in English (1995) 34, 19 2158-2160
a=10.9660(7)Å b=11.5970(5)Å c=19.0150(9)Å
α=90° β=90° γ=90°
C22H37AlClLiO7
C22H37AlClLiO7
Tetrahedron Letters (1994) 35, 16 2525-2528
a=9.631(2)Å b=17.544(1)Å c=15.187(4)Å
α=90° β=90.48(1)° γ=90°
C32H28Br2ClN2O4P
C32H28Br2ClN2O4P
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 5 593-601
a=17.759(1)Å b=7.643(1)Å c=23.417(2)Å
α=90° β=101.84(1)° γ=90°
C32H28Br3N2O4P
C32H28Br3N2O4P
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 5 593-601
a=17.769(9)Å b=7.622(3)Å c=23.31(1)Å
α=90° β=103.02(3)° γ=90°
C40H28Br2ClN2O4P
C40H28Br2ClN2O4P
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 5 593-601
a=9.185(2)Å b=15.150(3)Å c=25.844(5)Å
α=88.22(3)° β=83.20(3)° γ=85.10(3)°
C40H28Br3N2O4P
C40H28Br3N2O4P
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 5 593-601
a=11.202(2)Å b=13.086(3)Å c=13.432(3)Å
α=105.10(3)° β=104.16(3)° γ=92.99(3)°
C8H4ClNO2
C8H4ClNO2
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 4 506-512
a=5.728(1)Å b=6.275(1)Å c=20.725(2)Å
α=90° β=90° γ=90°
C32H30ClN2O4P
C32H30ClN2O4P
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 4 506-512
a=7.967(1)Å b=24.710(3)Å c=14.722(3)Å
α=90° β=90° γ=90°
C32H28Cl3N2O4P
C32H28Cl3N2O4P
Zeitschrift für Naturforschung, B: A Journal of Chemical Sciences (1994) 49, 4 506-512
a=17.61(2)Å b=7.534(7)Å c=23.18(2)Å
α=90° β=100.98(7)° γ=90°
C8H14Cl2NPTi
C8H14Cl2NPTi
Zeitschrift fuer Anorganische und Allgemeine Chemie (1994) 620, 10 1741-1749
a=12.026(1)Å b=12.242(1)Å c=17.667(1)Å
α=90° β=90° γ=90°
C6H18Cl6N2P2Ti2
C6H18Cl6N2P2Ti2
Zeitschrift fuer Anorganische und Allgemeine Chemie (1994) 620, 10 1741-1749
a=11.405(2)Å b=11.122(3)Å c=15.894(3)Å
α=90° β=90° γ=90°