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在标题络合物中,三夸{μ-2,6-双[2-(二甲氨基)乙基亚氨基甲基]-4-甲基苯酚}-μ-溴-溴二镍(II)溴一水合物乙腈二水盐,[Ni2英国2(C)17H(H)27N个4O) (H)2O)]溴·氢2O·2C(氧·2C)2H(H)N、 镍原子是八面体配位的,施主基团不同(N2O(运行)Br和N2O(运行)2英国2),金属间分离为3.2346(9)Au。

支持信息

到岸价

结晶信息文件(CIF)https://doi.org/10.107/S1600536804004118/hb6019sup1.cif
包含全局数据块,I

香港特别行政区

结构系数文件(CIF格式)https://doi.org/10.107/S1600536804004118/hb6019Isup2.hkl
包含数据块I

CCDC参考:236051

关键指标

  • 单晶X射线研究
  • T型=150 K
  • 平均值[西格玛](C-C)=0.007º
  • R(右)系数=0.041
  • 水风险系数=0.087
  • 数据与参数之比=16.3

检查CIF/PLATON结果

未发现语法错误
警报级别C RINTA01_ALERT_3_CRint的值大于0.10给出的铃声为0.102PLAT020_警报_3_CRint值大于0.10。。。。。。。。。0.10铭牌125_警报_4_C没有给定_symmetry_space_group_name_Hall?铭牌244_警报_4_C与相邻溶剂相比,低溶剂U(eq)。。。。C21型铭牌341_ALERT_3_CC-C键的低键精度(x 1000)Ang。。。7PLAT720_警报_4_C异常/非标准标签数量。。。。。。。。8
0A级警报=一般情况:严重问题0B级警报=潜在的严重问题6C级警报=检查并解释0G级警报=一般警报;检查0警报类型1 CIF构造/语法错误,数据不一致或缺失0警报类型2结构模型可能错误或有缺陷的指示器3警报类型3结构质量可能较低的指示器3警报类型4改进、方法、查询或建议

计算详细信息顶部

数据收集:智能(布鲁克,1997);单元格细化:智能(布鲁克,1997);数据缩减:SHELXTL公司(Bruker,1997);用于求解结构的程序:SHELXS97标准(谢尔德里克,1990年);用于优化结构的程序:SHELXL97型(Sheldrick,1997);分子图形:SHELXTL公司; 用于准备出版材料的软件:SHELXTL公司.

(一)顶部
水晶数据 顶部
[镍2英国2(C)17H(H)27N个4O) (H)2O)]溴·氢2O·2C(氧·2C)2H(H)N个F类(000) = 1640
M(M)第页= 814.75D类x个=1.739毫克负极
单诊所,P(P)21/n个K(K)α辐射,λ= 0.71073 Å
= 10.5662 (13) Å4188次反射的细胞参数
b条= 11.8911 (15) Åθ= 4.5–55.9°
c(c)= 25.158 (3) ŵ=5.1毫米负极1
β= 100.039 (2)°T型=150 K
V(V)= 3112.5 (7) Å块,绿色
Z轴= 40.25×0.18×0.1毫米
数据收集 顶部
CCD面积探测器
衍射仪
3844次反射> 2σ()
ω扫描R(右)整数= 0.102
吸收校正:多扫描
SADABS公司
θ最大值= 25°,θ最小值= 1.6°
T型最小值=0.344,T型最大值= 0.600小时=负极1212
14837次测量反射k个=负极1314
5468个独立反射=负极1429
精炼 顶部
优化于F类20个约束
最小二乘矩阵:完整通过独立和约束精化的混合物处理的H原子
R(右)[F类2> 2σ(F类2)] = 0.041 w个= 1/[σ2(F类o个2) + (0.0396P(P))2]
哪里P(P)= (F类o个2+ 2F类c(c)2)/3
水风险(F类2) = 0.088(Δ/σ)最大值= 0.004
S公司= 0.87Δρ最大值=0.79埃负极
5468次反射Δρ最小值=负极0.68埃负极
336个参数
特殊细节 顶部

几何图形所有的e.s.d.(除了两个l.s.平面之间的二面角中的e.s.d.)使用全协方差矩阵进行估计在估计e.s.d.的距离、角度时单独考虑和扭转角;e.s.d.细胞内参数之间的相关性仅为当它们由晶体对称性定义时使用。近似(各向同性)细胞e.s.d.的处理用于估计涉及l.s.的e.s.d。飞机。

精炼.改进F类2对抗所有反射。加权R(右)-因子水风险和贴合度S公司基于F类2,常规R(右)-因素R(右)基于F类,使用F类为设置为零消极的F类2。的阈值表达式F类2>σ(F类2)仅用于计算R(右)-因子(gt).并且与选择反射进行细化无关。R(右)-因素基于F类2从统计上看大约是两倍大作为那些基于F类、和R(右)-基于所有数据的系数将为甚至更大。溶剂水分子的氢原子通过乙腈溶剂分子的傅里叶差分和H原子为使用计算SHELXTL公司默认值,并在骑行模式下进行优化。

分数原子坐标和各向同性或等效各向同性位移参数2) 顶部
x个z(z)U型国际标准化组织*/U型等式
镍10.81815 (6)0.43356 (5)0.14829 (2)0.01980 (15)
镍21.07830 (6)0.57845 (5)0.15104 (2)0.02007 (16)
N1型0.7472 (4)0.3633 (3)0.20799 (15)0.0203 (9)
氮气20.6588 (4)0.3550 (3)0.09806 (15)0.0246 (10)
N3号机组1.2025(4)0.6669 (3)0.10632 (15)0.0264(10)
4号机组1.1978 (4)0.6352 (3)0.21460 (15)0.0210 (9)
O1公司0.9667 (3)0.5039 (2)0.20028 (11)0.0203 (7)
溴10.68349 (5)0.62015 (4)0.158445 (19)0.02665 (14)
溴化氢0.40820(5)0.41207 (4)0.26204 (2)0.02823 (14)
溴化氢0.92346 (5)0.50352 (4)0.071415 (18)0.02464 (13)
C1类0.9834 (5)0.5060 (4)0.25366 (17)0.0200 (11)
指挥与控制1.0874 (5)0.5646 (4)0.28553 (18)0.0201 (11)
C3类1.1014 (5)0.5627 (4)0.34183 (18)0.0252 (12)
H3A型1.17190.60210.36210.030*
补体第四成份1.0187(5)0.5069 (4)0.36972 (18)0.0265 (12)
C5级0.9178 (5)0.4516 (4)0.33876 (18)0.0243 (12)
H5A型0.85890.41280.35670.029*
C6级0.8968 (5)0.4489 (4)0.28251(18)0.0204 (11)
抄送70.7861 (5)0.3812 (4)0.25804 (18)0.0203 (11)
H7A型0.73800.34680.28220.024*
抄送80.6403 (5)0.2865 (4)0.18958 (18)0.0255 (12)
H8A型0.58270.28260.21660.031*
H8B型0.67320.21000.18450.031*
C90.5680 (5)0.3315(4)0.13649 (19)0.0272 (12)
H9A型0.50300.27580.12030.033*
H9B型0.52260.40160.14310.033*
C10号机组1.2670 (5)0.7499 (4)0.14618 (18)0.0275 (12)
H10A型1.20720.81240.14980.033*
H10B型1.34290.78160.13330.033*
C11号机组1.3087 (5)0.6947 (4)0.20040 (19)0.0256 (12)
H11A型1.37960.64110.19860.031*
H11B型1.33980.75220.22800.031*
第12项1.1860 (5)0.6243 (4)0.26417 (18)0.0225 (11)
H12A型1.24990.65990.28990.027*
第13页0.6992(5)0.2486 (4)0.07548 (19)0.0328 (13)
H13A型0.62490.21330.05290.049*
H13B型0.73430.19770.10500.049*
H13C型0.76520.26450.05350.049*
第14项0.5935 (5)0.4243 (5)0.05395 (18)0.0332 (13)
H14A型0.52180.38200.03330.050*
H14B型0.65410.44510.03020.050*
H14C型0.56060.49250.06870.050*
第15页1.1333 (5)0.7290 (4)0.05864 (19)0.0333 (13)
高度15a1.19570.76640.04000.050*
H15B型1.07660.78530.07060.050*
H15C型1.08190.67600.03390.050*
第16号1.2985 (5)0.5928 (4)0.0880 (2)0.0347 (14)
H16A型1.35240.63720.06780.052*
H16B型1.25430.53390.06450.052*
H16C型1.35240.55820.11930.052*
第17页1.0411 (6)0.5036 (4)0.43073 (18)0.0343 (13)
第17页0.97280.45970.44270.052*
H17B型1.04050.58030.44480.052*
H17C型1.12450.46850.44420.052*
5号机组0.2358 (5)0.2975(4)0.06533 (19)0.0457 (13)
第18号0.2516 (5)0.2751(4)0.0233 (2)0.0331 (13)
第19号0.2753 (6)0.2474 (5)负极0.03043 (19)0.0415 (15)
H19A型0.29290.3165负极0.04910.062*
H19B型0.19940.2102负极0.05090.062*
H19C型0.34950.1969负极0.02750.062*
N6号0.8338 (7)0.0137 (5)0.0290 (3)0.0721 (18)
C21型0.9275 (7)0.0317 (5)0.0569 (3)0.0446 (16)
C20个1.0464 (6)0.0526 (5)0.0928 (2)0.0497 (17)
H20A型1.05490.13340.10050.074*
20小时1.11830.02750.07590.074*
H20C(H20C)1.04720.01130.12660.074*
O1瓦0.8943 (3)0.1239(3)0.21606 (14)0.0350 (9)
H1WA公司0.94380.07100.22950.042*
H1WB公司0.87550.12930.24750.042*
O2瓦0.9432 (3)0.2916 (3)0.14973(12)0.0250 (8)
H2WA公司1.01840.31770.15990.030*
过氧化氢0.92000.23950.16910.030*
O3瓦1.1767 (3)0.4181 (3)0.15724 (12)0.0253(8)
H3WA公司1.19400.38250.13010.030*
H3WB公司1.23670.41660.18450.030*
4瓦0.9652 (3)0.7244 (2)0.15005 (12)0.0237 (8)
H4WA型0.99850.77330.17290.028*
H4WB型0.89190.69720.15210.028美元*
原子位移参数(2) 顶部
U型11U型22U型33U型12U型13U型23
镍10.0218 (4)0.0167 (3)0.0219 (3)负极0.0015 (3)0.0064 (3)负极0.0012 (2)
镍20.0213 (4)0.0168 (3)0.0233 (3)负极0.0006 (3)0.0070 (3)负极0.0005 (2)
N1型0.023(2)0.012 (2)0.027 (2)负极0.0014 (18)0.0090 (18)0.0015 (16)
氮气20.025 (3)0.024 (2)0.025 (2)0.000 (2)0.0076 (19)负极0.0046 (17)
N3号机组0.027 (3)0.024 (2)0.030 (2)负极0.004 (2)0.010 (2)负极0.0013 (18)
4号机组0.019 (2)0.014 (2)0.030 (2)0.0000 (18)0.0048 (18)0.0001 (16)
O1公司0.022 (2)0.0182(17)0.0220 (17)负极0.0030 (14)0.0070(14)负极0.0001 (13)
溴10.0264 (3)0.0205 (3)0.0343 (3)0.0011 (2)0.0088 (2)负极0.0015 (2)
溴化氢0.0293 (3)0.0199 (3)0.0354 (3)0.0011 (2)0.0057(2)0.0046 (2)
溴化氢0.0291 (3)0.0235 (3)0.0224 (2)负极0.0031 (2)0.0075 (2)负极0.0009 (2)
C1类0.023 (3)0.013 (2)0.024 (2)0.005 (2)0.005 (2)负极0.0007 (19)
指挥与控制0.019 (3)0.018(3)0.023(2)0.005 (2)0.003 (2)负极0.002 (2)
C3类0.025 (3)0.020 (3)0.029 (3)0.005 (2)0.001 (2)负极0.009 (2)
补体第四成份0.032 (3)0.022 (3)0.026 (3)0.005 (2)0.007 (2)负极0.004 (2)
C5级0.028 (3)0.022 (3)0.025 (3)0.006 (2)0.010 (2)0.003 (2)
C6级0.020 (3)0.016 (3)0.026 (3)0.000 (2)0.007 (2)负极0.0019 (19)
抄送70.022 (3)0.017 (2)0.024 (3)0.004 (2)0.009 (2)0.006 (2)
抄送80.024 (3)0.022 (3)0.032 (3)负极0.006 (2)0.009 (2)0.002 (2)
C90.027 (3)0.022 (3)0.034 (3)负极0.006 (2)0.007 (2)负极0.001 (2)
C10号机组0.029 (3)0.024 (3)0.032 (3)负极0.007 (2)0.015 (2)0.000 (2)
C11号机组0.020 (3)0.025 (3)0.032 (3)负极0.007 (2)0.005 (2)负极0.002 (2)
第12项0.021 (3)0.017 (3)0.028 (3)0.002 (2)负极0.001 (2)负极0.004 (2)
第13页0.036 (3)0.027 (3)0.036 (3)负极0.006 (3)0.008 (3)负极0.012 (2)
第14项0.036 (4)0.039(3)0.023 (3)负极0.006 (3)负极0.001 (2)0.002 (2)
第15页0.040 (4)0.029 (3)0.034 (3)负极0.006 (3)0.014 (3)0.005 (2)
第16号0.034 (4)0.029 (3)0.047 (3)负极0.003(3)0.023 (3)负极0.005 (2)
第17页0.044 (4)0.037 (3)0.022 (3)0.001 (3)0.003 (2)负极0.001 (2)
5号机组0.056 (4)0.042 (3)0.042 (3)负极0.001 (3)0.016 (3)负极0.009 (2)
第18号0.035 (4)0.025 (3)0.037 (3)0.001 (3)负极0.001 (3)0.002 (2)
第19号0.054 (4)0.041 (4)0.029 (3)0.004 (3)0.007(3)0.001 (2)
N6号0.065 (5)0.059 (4)0.087 (5)0.004 (4)负极0.003(4)负极0.012 (3)
C21型0.048 (5)0.037 (4)0.048 (4)0.004 (3)0.007(3)负极0.005(3)
C20个0.062(5)0.043 (4)0.044 (4)0.001 (3)0.010 (3)负极0.008 (3)
O1瓦0.038 (2)0.027(2)0.040 (2)0.0096 (18)0.0104 (18)0.0104(16)
O2瓦0.026 (2)0.0182 (18)0.0331 (19)负极0.0003 (15)0.0113 (16)负极0.0008(14)
O3瓦0.024 (2)0.0252 (18)0.0266 (18)0.0031 (16)0.0059 (15)负极0.0036 (14)
四轮驱动0.024 (2)0.0186 (17)0.0295 (18)负极0.0050 (15)0.0067(15)负极0.0049 (14)
几何参数(λ,º) 顶部
Ni1-N1型1.977 (3)C9-H9B型0.9900
镍-O12.039 (3)C10-C11号机组1.509 (6)
镍-N22.136 (4)C10-H10A型0.9900
Ni1-O2W合金2.140 (3)C10-H10B型0.9900
Ni1-Br3合金2.5339 (7)C11-H11A型0.9900
Ni1-Br1合金2.6720 (8)C11-H11B型0.9900
Ni1-Ni2合金3.2346 (9)C12-H12A型0.9500
镍-N41.976 (4)C13-H13A型0.9800
二氧化二镍2.055 (3)C13-H13B型0.9800
镍-O4W2.105 (3)C13-H13C型0.9800
镍-N32.147 (4)C14-H14A型0.9800
Ni2-O3W合金2.164 (3)C14-H14B型0.9800
Ni2-Br3合金2.5181 (8)2014年4月14日0.9800
N1-C7型1.272 (5)C15-H15A型0.9800
N1-C8型1.463 (6)C15-H15B型0.9800
N2-C14型1.457 (6)C15-H15C0.9800
N2-C13型1.479 (6)C16-H16A型0.9800
N2-C9气体1.502 (5)C16-H16B型0.9800
编号3-C161.477 (6)C16-H16C型0.9800
N3-C10型1.485 (6)C17-H17A型0.9800
编号3-C151.488 (6)C17-H17B型0.9800
编号4-C121.281 (5)C17-H17C型0.9800
N4-C11型1.466 (6)编号5-C181.131(6)
O1-C1型1.324 (5)第18页至第19页1.454 (7)
C1-C2类1.424 (7)C19年1月19日0.9800
C1-C6号机组1.434 (6)C19-H19B型0.9800
C2-C3型1.398 (6)C19-H19C型0.9800
C2-C12型1.440 (6)编号6-C211.129 (8)
C3-C4型1.382 (7)C21-C20型1.436 (9)
C3-H3A型0.9500C20-H20A型0.9800
C4-C5型1.374 (7)C20-H20B型0.9800
C4-C17型1.512 (6)C20-H20C0.9800
C5至C61.394 (6)O1W-H1WA型0.8499
C5-H5A型0.9500O1W-H1WB型0.8501
C6至C71.464 (7)O2W-H2WA型0.8500
C7-H7A型0.9500氧气-H2WB0.8500
C8-C9型1.516 (7)O3W-H3WA型0.8499
C8-H8A型0.9900O3W-H3WB型0.8499
C8-H8B型0.9900O4W-H4WA型0.8500
C9-H9A型0.9900O4W-H4WB型0.8499
N1-Ni1-O1型92.14(14)N1-C7-H7A型116.4
N1-Ni1-N284.28 (15)C6-C7-H7A型116.4
O1-Ni1-N2176.42 (13)N1-C8-C9型107.5 (4)
N1-Ni1-O2W型88.18 (13)N1-C8-H8A型110.2
O1-Ni1-O2W型84.78 (12)C9-C8-H8A110.2
N2-Ni1-O2W气体94.89 (14)N1-C8-H8B型110.2
N1-Ni1-Br3173.56 (11)C9-C8-H8B110.2
O1-Ni1-Br387.92 (8)H8A-C8-H8B108.5
N2-Ni1-Br3气体95.61 (10)N2-C9-C8型110.6 (4)
O2W-Ni1-Br3型85.41 (8)N2-C9-H9A型109.5
N1-Ni1-Br1型89.98 (11)C8-C9-H9A型109.5
O1-Ni1-Br1型87.77 (9)N2-C9-H9B型109.5
N2-Ni1-Br1气体92.41 (11)C8-C9-H9B型109.5
O2W-Ni1-Br1型172.26 (9)H9A-C9-H9B108.1
Br3-Ni1-Br1型96.45 (2)N3-C10-C11型110.4 (4)
N1-Ni1-Ni2型129.96 (12)N3-C10-H10A型109.6
O1-Ni1-Ni237.97 (8)C11-C10-H10A型109.6
N2-Ni1-Ni2145.58 (10)N3-C10-H10B型109.6
O2W-Ni1-Ni284.27(9)C11-C10-H10B型109.6
Br3-Ni1-Ni249.974 (19)H10A-C10-H10B108.1
Br1-Ni1-Ni291.17 (2)N4-C11-C10108.1 (4)
N4-Ni2-O1合金90.72 (14)N4-C11-H11A型110.1
N4-Ni2-O4W型90.51 (14)C10-C11-H11A型110.1
O1-Ni2-O4W型88.77 (12)N4-C11-H11B型110.1
N4-Ni2-N3型83.91(15)C10-C11-H11B110.1
O1-Ni2-N3型174.27(14)H11A-C11-H11B型108.4
O4W-Ni2-N3型89.28 (14)N4-C12-C2型127.8 (5)
N4-Ni2-O3W合金90.66 (14)N4-C12-H12A型116.1
O1-Ni2-O3W型84.01 (12)C2-C12-H12A型116.1
O4W-Ni2-O3W型172.71 (11)N2-C13-H13A型109.5
N3-Ni2-O3W型98.01 (14)N2-C13-H13B型109.5
N4-Ni2-Br3合金178.72 (11)H13A-C13-H13B型109.5
O1-Ni2-Br3型88.01 (9)N2-C13-H13C型109.5
O4W-Ni2-Br3型89.64 (9)H13A-C13-H13C型109.5
N3-Ni2-Br3型97.37 (11)H13B-C13-H13C型109.5
O3W-Ni2-Br3合金89.03 (9)N2-C14-H14A型109.5
N4-Ni2-Ni1型128.33 (11)N2-C14-H14B型109.5
O1-Ni2-Ni137.63 (9)H14A-C14-H14B109.5
O4W-Ni2-Ni1型87.74 (9)N2-C14-H14C型109.5
N3-Ni2-Ni1型147.63 (12)H14A-C14-H14C109.5
O3W-Ni2-Ni1合金85.88 (9)H14B-C14-H14C型109.5
Br3-Ni2-Ni1型50.403 (18)N3-C15-H15A型109.5
C7-N1-C8型121.1 (4)N3-C15-H15B型109.5
C7-N1-Ni1型125.5 (3)H15A-C15-H15B109.5
C8-N1-Ni1型113.4 (3)N3-C15-H15C109.5
C14-N2-C13型108.8 (4)H15A-C15-H15C109.5
C14-N2-C9型108.9 (4)H15B-C15-H15C型109.5
C13-N2-C9型110.4 (4)N3-C16-H16A109.5
C14-N2-Ni1型115.0 (3)N3-C16-H16B109.5
C13-N2-Ni1110.5 (3)H16A-C16-H16B109.5
C9-N2-Ni1103.1 (3)N3-C16-H16C型109.5
C16-N3-C10型110.4 (4)H16A-C16-H16C型109.5
C16-N3-C15108.2 (4)H16B-C16-H16C型109.5
C10-N3-C15型108.5 (4)C4-C17-H17A型109.5
C16-N3-Ni2合金112.8 (3)C4-C17-H17B型109.5
C10-N3-Ni2合金102.8 (3)H17A-C17-H17B型109.5
C15-N3-Ni2合金113.9 (3)C4-C17-H17C型109.5
C12-N4-C11型120.3 (4)H17A-C17-H17C型109.5
C12-N4-Ni2型126.6 (3)H17B-C17-H17C型109.5
C11-N4-Ni2型113.1 (3)编号5-C18-C19178.5 (6)
C1-O1-Ni1型127.6 (3)C18-C19-H19A型109.5
C1-O1-Ni2127.9 (3)C18-C19-H19B型109.5
Ni1-O1-Ni2合金104.40 (13)H19A-C19-H19B109.5
Ni2-Br3-Ni1合金79.62 (2)C18-C19-H19C型109.5
O1-C1-C2型122.3 (4)H19A-C19-H19C109.5
O1-C1-C6型121.4 (4)H19B-C19-H19C109.5
C2-C1-C6型116.4(4)N6-C21-C20型178.9 (8)
C3-C2-C1119.8 (4)C21-C20-H20A109.5
C3-C2-C12型115.5 (4)C21-C20-H20B型109.5
C1-C2-C12型124.6 (4)H20A-C20-H20B109.5
C4-C3-C2型123.9 (5)C21-C20-H20C型109.5
C4-C3-H3A型118.1H20A-C20-H20C109.5
C2-C3-H3A型118.1H20B-C20-H20C型109.5
C5-C4-C3116.0 (4)H1WA-O1W-H1WB85
C5-C4-C17型122.1 (4)Ni1-O2W-H2WA合金105
C3-C4-C17型121.8 (5)Ni1-O2W-H2WB合金110.2
C4-C5-C6123.8 (4)H2WA-O2W-H2WB116.2
C4-C5-H5A型118.1Ni2-O3W-H3WA合金123.3
C6-C5-H5A型118.1Ni2-O3W-H3WB合金111
C5-C6-C1120.0 (4)H3WA-O3W-H3WB型113.8
C5-C6-C7114.4 (4)Ni2-O4W-H4WA合金112.9
C1-C6-C7型125.5 (4)Ni2-O4W-H4WB合金101.9
N1-C7-C6127.2 (4)H4WA-O4W-H4WB119.7
氢键几何形状(λ,º) 顶部
D类-小时···A类D类-小时H(H)···A类D类···A类D类-小时···A类
O1公司W公司-上半年华盛顿州···溴化氢0.852.443.256 (3)162
O1公司W公司-H1型工作分解结构···溴10.852.553.398 (3)173
氧气W公司-氢华盛顿州···臭氧W公司0.852.072.868 (4)157
氧气W公司-氢气工作分解结构···O1公司W公司0.851.862.707 (4)172
臭氧W公司-H3级华盛顿州···5号机组ii(ii)0.852.032.880 (5)180
臭氧W公司-H3级工作分解结构···溴化氢ii(ii)0.852.423.270 (3)180
O4号机组W公司-H4型华盛顿州···溴化氢0.852.413.260 (3)180
O4号机组W公司-H4型工作分解结构···溴10.852.423.266 (3)180
对称代码:(i)负极x个+3/2,负极1/2,负极z(z)+1/2; (ii)x个+1,z(z); (iii)负极x个+3/2,+1/2,负极z(z)+1/2。
 

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